Attachment 194008 Details for Bug 228317 – QA LOG for x11-wm/icewm

QA LOG for x11-wm/icewm

icewm-1384-clang60-LOG (text/plain), 428.76 KB, created by Chris Hutchinson on 2018-06-05 01:40:35 UTC

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Creator: Chris Hutchinson

Created: 2018-06-05 01:40:35 UTC

Size: 428.76 KB

patch

obsolete

>Script started on Fri May 25 19:20:01 2018
>root@12current:/usr/ports/x11-wm/icewm # make -DBATCH check-plist
>
>===>  License GPLv2 accepted by the user
>===>   icewm-1.3.8_4 depends on file: /usr/local/sbin/pkg - found
>===> Fetching all distfiles required by icewm-1.3.8_4 for building
>===>  Extracting for icewm-1.3.8_4
>=> SHA256 Checksum OK for icewm-1.3.8.tar.gz.
>===>  Patching for icewm-1.3.8_4
>===>  Applying extra patch /usr/ports/x11-wm/icewm/files/extra-menu-icon-fix.patch
>===>  Applying FreeBSD patches for icewm-1.3.8_4
>XXXX: 50
>===>   icewm-1.3.8_4 depends on executable: gmake - found
>===>   icewm-1.3.8_4 depends on package: pkgconf>=1.3.0_1 - found
>===>   icewm-1.3.8_4 depends on executable: msgfmt - found
>===>   icewm-1.3.8_4 depends on file: /usr/local/bin/clang60 - found
>===>   icewm-1.3.8_4 depends on file: /usr/local/libdata/pkgconfig/ice.pc - found
>===>   icewm-1.3.8_4 depends on file: /usr/local/libdata/pkgconfig/sm.pc - found
>===>   icewm-1.3.8_4 depends on file: /usr/local/libdata/pkgconfig/x11.pc - found
>===>   icewm-1.3.8_4 depends on file: /usr/local/libdata/pkgconfig/xext.pc - found
>===>   icewm-1.3.8_4 depends on file: /usr/local/libdata/pkgconfig/xrender.pc - found
>===>   icewm-1.3.8_4 depends on file: /usr/local/libdata/pkgconfig/xinerama.pc - found
>===>   icewm-1.3.8_4 depends on file: /usr/local/libdata/pkgconfig/xrandr.pc - found
>===>   icewm-1.3.8_4 depends on shared library: libfreetype.so - found (/usr/local/lib/libfreetype.so)
>===>   icewm-1.3.8_4 depends on shared library: libfontconfig.so - found (/usr/local/lib/libfontconfig.so)
>===>   icewm-1.3.8_4 depends on shared library: libXft.so - found (/usr/local/lib/libXft.so)
>===>   icewm-1.3.8_4 depends on shared library: libiconv.so - found (/usr/local/lib/libiconv.so)
>===>   icewm-1.3.8_4 depends on shared library: libintl.so - found (/usr/local/lib/libintl.so)
>===>   icewm-1.3.8_4 depends on shared library: libgdk_pixbuf-2.0.so - found (/usr/local/lib/libgdk_pixbuf-2.0.so)
>===>   icewm-1.3.8_4 depends on shared library: libglib-2.0.so - found (/usr/local/lib/libglib-2.0.so)
>===>   icewm-1.3.8_4 depends on shared library: libintl.so - found (/usr/local/lib/libintl.so)
>===>  Configuring for icewm-1.3.8_4
>configure: loading site script /usr/ports/Templates/config.site
>checking build system type... amd64-portbld-freebsd12.0
>checking host system type... amd64-portbld-freebsd12.0
>checking target system type... amd64-portbld-freebsd12.0
>checking whether the C++ compiler works... yes
>checking for C++ compiler default output file name... a.out
>checking for suffix of executables... 
>checking whether we are cross compiling... no
>checking for suffix of object files... o
>checking whether we are using the GNU C++ compiler... yes
>checking whether /usr/local/bin/clang++60 accepts -g... yes
>checking whether the C++ compiler (/usr/local/bin/clang++60) accepts no_rtti... yes
>checking for a BSD-compatible install... /usr/bin/install -c
>checking for dirent.h that defines DIR... yes
>checking for library containing opendir... none required
>checking for sys/wait.h that is POSIX.1 compatible... (cached) yes
>checking how to run the C++ preprocessor... /usr/local/bin/clang++60 -E
>checking for grep that handles long lines and -e... (cached) /usr/bin/grep
>checking for egrep... (cached) /usr/bin/egrep
>checking for ANSI C header files... (cached) yes
>checking for sys/types.h... (cached) yes
>checking for sys/stat.h... (cached) yes
>checking for stdlib.h... (cached) yes
>checking for string.h... (cached) yes
>checking for memory.h... (cached) yes
>checking for strings.h... (cached) yes
>checking for inttypes.h... (cached) yes
>checking for stdint.h... (cached) yes
>checking for unistd.h... (cached) yes
>checking for fcntl.h... (cached) yes
>checking for limits.h... (cached) yes
>checking for strings.h... (cached) yes
>checking for sys/ioctl.h... (cached) yes
>checking for sys/time.h... (cached) yes
>checking for unistd.h... (cached) yes
>checking linux/threads.h usability... no
>checking linux/threads.h presence... no
>checking for linux/threads.h... no
>checking linux/tasks.h usability... no
>checking linux/tasks.h presence... no
>checking for linux/tasks.h... no
>checking for sched.h... (cached) yes
>checking sys/dkstat.h usability... yes
>checking sys/dkstat.h presence... yes
>checking for sys/dkstat.h... yes
>checking for sys/param.h... (cached) yes
>checking for sys/sysctl.h... (cached) yes
>checking uvm/uvm_param.h usability... no
>checking uvm/uvm_param.h presence... no
>checking for uvm/uvm_param.h... no
>checking for libgen.h... (cached) yes
>checking machine/apmvar.h usability... no
>checking machine/apmvar.h presence... no
>checking for machine/apmvar.h... no
>checking machine/apm_bios.h usability... yes
>checking machine/apm_bios.h presence... yes
>checking for machine/apm_bios.h... yes
>checking kstat.h usability... no
>checking kstat.h presence... no
>checking for kstat.h... no
>checking for size_t... (cached) yes
>checking whether time.h and sys/time.h may both be included... yes
>checking whether struct tm is in sys/time.h or time.h... time.h
>checking size of char... 1
>checking size of short... 2
>checking size of int... 4
>checking size of long... 8
>checking return type of signal handlers... void
>checking for strftime... (cached) yes
>checking for vprintf... (cached) yes
>checking for _doprnt... no
>checking for gettimeofday... (cached) yes
>checking for putenv... (cached) yes
>checking for select... (cached) yes
>checking for socket... yes
>checking for strtol... (cached) yes
>checking for strtoul... (cached) yes
>checking for basename... (cached) yes
>checking for sysctlbyname... yes
>checking for sys/select.h... (cached) yes
>checking for sys/socket.h... (cached) yes
>checking types of arguments for select... int,fd_set *,struct timeval *
>checking for getloadavg... yes
>checking for kern.cp_time... yes
>checking for X... libraries /usr/local/lib, headers /usr/local/include
>checking whether -R must be followed by a space... neither works
>checking for gethostbyname... (cached) yes
>checking for connect... yes
>checking for remove... yes
>checking for shmat... yes
>checking for IceConnectionNumber in -lICE... yes
>checking for langinfo.h... (cached) yes
>checking for nl_langinfo... (cached) yes
>checking whether nl_langinfo supports CODESET... yes
>checking whether nl_langinfo supports _NL_CTYPE_CODESET_NAME... no
>checking iconv.h usability... yes
>checking iconv.h presence... yes
>checking for iconv.h... yes
>checking whether _libiconv_version is declared... yes
>assuming iconv.h belongs to GNU libiconv
>checking whether iconv converts from UTF-8 to UCS-4//TRANSLIT... yes
>checking whether iconv converts from ISO-8859-1 to UCS-4//TRANSLIT... yes
>checking whether iconv converts from ISO-8859-2 to UCS-4//TRANSLIT... yes
>checking whether iconv converts from UTF-8 to UCS-4//TRANSLIT... yes
>checking for bindtextdomain... no
>checking for bindtextdomain in -lintl... yes
>checking for xgettext... /usr/local/bin/xgettext
>checking for msgmerge... /usr/local/bin/msgmerge
>checking for msgfmt... /usr/local/bin/msgfmt
>checking for XInternAtoms in -lX11... yes
>checking for IceConnectionNumber in -lICE... (cached) yes
>checking for XShapeCombineRectangles in -lXext... yes
>checking for xft-config... /usr/local/bin/xft-config
>checking for XineramaQueryScreens in -lXinerama... yes
>./configure: kde-config: not found
>configure: creating ./config.status
>config.status: creating Makefile
>config.status: creating src/Makefile
>config.status: creating po/Makefile
>config.status: WARNING:  'po/Makefile.in' seems to ignore the --datarootdir setting
>config.status: creating lib/keys
>config.status: creating lib/menu
>config.status: creating lib/programs
>config.status: creating lib/toolbar
>config.status: creating lib/winoptions
>config.status: creating src/config.h
>config.status: executing config.status commands
>
>Build targets: base nls
>Applications: icewm icewm-session icesh icewmhint icewmbg icewmtray icesound icehelp
>Image library: gdk_pixbuf_xlib
>Audio support: OSS
>Features: i18n nls shaped-decorations gradients xfreetype gui-events
>Paths: PREFIX: /usr/local
>       BINDIR: /usr/local/bin
>       LOCDIR: /usr/local/share/locale
>       LIBDIR: /usr/local/share/icewm
>       CFGDIR: /usr/local/share/icewm
>       KDEDIR: /usr/local/share
>       DOCDIR: /usr/local/share/doc
>       MANDIR: /usr/local/man
>===>  Building for icewm-1.3.8_4
>gmake[1]: Entering directory '/usr/ports/x11-wm/icewm/work/icewm-1.3.8'
>gmake[2]: Entering directory '/usr/ports/x11-wm/icewm/work/icewm-1.3.8/po'
>/usr/local/bin/msgfmt -o be.mo be.po
>/usr/local/bin/msgfmt -o bg.mo bg.po
>/usr/local/bin/msgfmt -o ca.mo ca.po
>gmake[2]: Entering directory '/usr/ports/x11-wm/icewm/work/icewm-1.3.8/src'
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c ymsgbox.cc
>/usr/local/bin/msgfmt -o cs.mo cs.po
>/usr/local/bin/msgfmt -o da.mo da.po
>/usr/local/bin/msgfmt -o de.mo de.po
>/usr/local/bin/msgfmt -o el.mo el.po
>/usr/local/bin/msgfmt -o en.mo en.po
>/usr/local/bin/msgfmt -o es.mo es.po
>/usr/local/bin/msgfmt -o fi.mo fi.po
>/usr/local/bin/msgfmt -o fr.mo fr.po
>/usr/local/bin/msgfmt -o hr.mo hr.po
>/usr/local/bin/msgfmt -o hu.mo hu.po
>/usr/local/bin/msgfmt -o id.mo id.po
>/usr/local/bin/msgfmt -o it.mo it.po
>/usr/local/bin/msgfmt -o ja.mo ja.po
>/usr/local/bin/msgfmt -o ko.mo ko.po
>/usr/local/bin/msgfmt -o lt.mo lt.po
>/usr/local/bin/msgfmt -o lv.mo lv.po
>/usr/local/bin/msgfmt -o mk.mo mk.po
>/usr/local/bin/msgfmt -o nb.mo nb.po
>/usr/local/bin/msgfmt -o nl.mo nl.po
>/usr/local/bin/msgfmt -o pl.mo pl.po
>/usr/local/bin/msgfmt -o pt_BR.mo pt_BR.po
>/usr/local/bin/msgfmt -o ro.mo ro.po
>/usr/local/bin/msgfmt -o ru.mo ru.po
>/usr/local/bin/msgfmt -o sk.mo sk.po
>/usr/local/bin/msgfmt -o sl.mo sl.po
>/usr/local/bin/msgfmt -o sv.mo sv.po
>/usr/local/bin/msgfmt -o tr.mo tr.po
>/usr/local/bin/msgfmt -o uk.mo uk.po
>/usr/local/bin/msgfmt -o vi.mo vi.po
>/usr/local/bin/msgfmt -o zh_CN.mo zh_CN.po
>/usr/local/bin/msgfmt -o zh_TW.mo zh_TW.po
>gmake[2]: Leaving directory '/usr/ports/x11-wm/icewm/work/icewm-1.3.8/po'
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c ydialog.cc
>In file included from ymsgbox.cc:13:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymsgbox.cc:13:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymsgbox.cc:13:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymsgbox.cc:13:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymsgbox.cc:13:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymsgbox.cc:13:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymsgbox.cc:13:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymsgbox.cc:13:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymsgbox.cc:13:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymsgbox.cc:13:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymsgbox.cc:29:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fLabel = new YLabel(null, this);
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ydialog.cc:13:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ydialog.cc:13:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ydialog.cc:13:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ydialog.cc:13:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ydialog.cc:13:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ydialog.cc:13:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ydialog.cc:13:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ydialog.cc:13:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ydialog.cc:13:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ydialog.cc:13:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ydialog.cc:37:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fGradient = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ydialog.cc:46:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (dialogbackPixbuf != null
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ydialog.cc:47:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        && !(fGradient != null &&
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ydialog.cc:55:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fGradient != null)
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ydialog.cc:59:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (dialogbackPixmap != null)
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>11 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c yurl.cc
>In file included from yurl.cc:12:
>In file included from ./yurl.h:13:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yurl.cc:12:
>In file included from ./yurl.h:13:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yurl.cc:12:
>In file included from ./yurl.h:13:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yurl.cc:12:
>In file included from ./yurl.h:13:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yurl.cc:12:
>In file included from ./yurl.h:13:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:24:13: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fScheme(null), fUser(null), fPassword(null),
>            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:24:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fScheme(null), fUser(null), fPassword(null),
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:24:43: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fScheme(null), fUser(null), fPassword(null),
>                                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:25:11: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fHost(null), fPort(null), fPath(null) {
>          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:25:24: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fHost(null), fPort(null), fPath(null) {
>                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:25:37: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fHost(null), fPort(null), fPath(null) {
>                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:29:13: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fScheme(null), fUser(null), fPassword(null),
>            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:29:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fScheme(null), fUser(null), fPassword(null),
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:29:43: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fScheme(null), fUser(null), fPassword(null),
>                                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:30:11: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fHost(null), fPort(null), fPath(null) {
>          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:30:24: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fHost(null), fPort(null), fPath(null) {
>                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:30:37: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fHost(null), fPort(null), fPath(null) {
>                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:38:15: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fScheme = null;
>              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:39:13: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fUser = null;
>            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:40:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fPassword = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:41:13: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fHost = null;
>            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:42:13: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fPort = null;
>            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:43:13: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fPath = null;
>            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:90:16: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (str != null) {
>               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:93:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            return null;
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:101:28: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    return null;
>                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>yurl.cc:106:28: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    return null;
>                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>15 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmsession.cc
>27 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmwinlist.cc
>In file included from wmsession.cc:14:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmsession.cc:14:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmsession.cc:14:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmsession.cc:14:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmsession.cc:14:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmsession.cc:14:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmsession.cc:14:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmsession.cc:14:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmsession.cc:14:
>In file included from ./wmframe.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmsession.cc:14:
>In file included from ./wmframe.h:7:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmsession.cc:26:14: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    clientId(null), windowRole(null), windowClass(null), windowInstance(null)
>             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmsession.cc:26:32: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    clientId(null), windowRole(null), windowClass(null), windowInstance(null)
>                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmsession.cc:26:51: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    clientId(null), windowRole(null), windowClass(null), windowInstance(null)
>                                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmsession.cc:26:73: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    clientId(null), windowRole(null), windowClass(null), windowInstance(null)
>                                                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmsession.cc:31:49: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    clientId(id), windowRole(role), windowClass(null), windowInstance(null)
>                                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmsession.cc:31:71: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    clientId(id), windowRole(role), windowClass(null), windowInstance(null)
>                                                                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmsession.cc:36:30: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    clientId(id), windowRole(null), windowClass(klass), windowInstance(instance)
>                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmsession.cc:92:16: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (cid == null) return false;
>               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmsession.cc:98:44: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (window->key.windowClass != null &&
>                                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmsession.cc:99:47: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                window->key.windowInstance != null)
>                                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmsession.cc:101:33: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                ustring klass = null;
>                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmsession.cc:102:36: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                ustring instance = null;
>                                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmsession.cc:306:24: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (cid != null) {
>                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmsession.cc:310:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                if (role != null) {
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinlist.cc:10:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinlist.cc:10:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinlist.cc:10:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinlist.cc:10:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinlist.cc:10:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinlist.cc:10:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinlist.cc:10:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinlist.cc:10:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinlist.cc:11:
>In file included from ./wmwinlist.h:6:
>In file included from ./wmclient.h:5:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinlist.cc:11:
>In file included from ./wmwinlist.h:6:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinlist.cc:12:
>./ymenuitem.h:25:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (fName != null && fHotCharPos >= 0) ? fName.charAt(fHotCh...
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinlist.cc:12:
>./ymenuitem.h:47:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool isSeparator() { return getName() == null && getSubmenu() == 0; }
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmwinlist.cc:70:16: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return null;
>               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmwinlist.cc:295:50: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    closeSubmenu->addItem(_("_Kill Client"), -2, null, actionKill);
>                                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmwinlist.cc:303:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    windowListPopup->addItem(_("_Show"), -2, null, actionShow);
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmwinlist.cc:305:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    windowListPopup->addItem(_("_Hide"), -2, null, actionHide);
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmwinlist.cc:307:50: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    windowListPopup->addItem(_("_Minimize"), -2, null, actionMinimize);
>                                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>24 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmtaskbar.cc
>In file included from wmtaskbar.cc:14:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtaskbar.cc:14:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtaskbar.cc:14:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtaskbar.cc:14:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtaskbar.cc:14:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtaskbar.cc:14:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtaskbar.cc:14:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtaskbar.cc:14:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtaskbar.cc:15:
>In file included from ./wmtaskbar.h:5:
>In file included from ./ybutton.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtaskbar.cc:15:
>In file included from ./wmtaskbar.h:8:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtaskbar.cc:18:
>./ymenuitem.h:25:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (fName != null && fHotCharPos >= 0) ? fName.charAt(fHotCh...
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtaskbar.cc:18:
>./ymenuitem.h:47:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool isSeparator() { return getName() == null && getSubmenu() == 0; }
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:85:23: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (startImage == null || !startImage->valid())
>                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:87:23: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (startImage == null || !startImage->valid())
>                      ^~~~
>17./ref.h:22:15: note: expanded from macro 'null'
> warnings generated.
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:89:23: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (startImage == null || !startImage->valid())
>                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:91:23: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (startImage == null || !startImage->valid())
>                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:101:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (taskbackPixbuf == null)
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:103:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (taskbuttonPixbuf == null)
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:105:35: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (taskbuttonactivePixbuf == null)
>                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:107:38: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (taskbuttonminimizedPixbuf == null)
>                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmwinmenu.cc
>wmtaskbar.cc:357:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    taskbackPixmap = null;
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:358:24: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    taskbuttonPixmap = null;
>                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:359:30: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    taskbuttonactivePixmap = null;
>                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:360:33: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    taskbuttonminimizedPixmap = null;
>                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:368:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    startImage = null;
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:369:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    windowsImage = null;
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:370:24: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    showDesktopImage = null;;
>                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:372:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    mailPixmap = null;
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:373:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    noMailPixmap = null;
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:374:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    errMailPixmap = null;
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:375:24: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    unreadMailPixmap = null;
>                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:376:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    newMailPixmap = null;
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:379:16: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    PixSpace = null;
>               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:380:16: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    PixSlash = null;
>               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:381:14: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    PixDot = null;
>             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:382:12: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    PixA = null;
>           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:383:12: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    PixP = null;
>           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:384:12: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    PixM = null;
>           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:385:16: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    PixColon = null;
>               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:387:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        PixNum[n] = null;
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:417:49: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        taskBarMenu->addItem(_("_Refresh"), -2, null, actionRefresh);
>                                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:455:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        mstring s(null), r(null);
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:455:28: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        mstring s(null), r(null);
>                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:510:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        mstring s(null), r(null);
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:510:28: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        mstring s(null), r(null);
>                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:552:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (t != null) {
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:939:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (taskbackPixbuf != null &&
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:940:24: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        !(fGradient != null &&
>                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:952:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fGradient != null)
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtaskbar.cc:956:31: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (taskbackPixmap != null)
>                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinmenu.cc:12:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinmenu.cc:12:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinmenu.cc:12:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinmenu.cc:12:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinmenu.cc:12:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinmenu.cc:12:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinmenu.cc:12:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinmenu.cc:12:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinmenu.cc:12:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinmenu.cc:13:
>./ymenuitem.h:25:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (fName != null && fHotCharPos >= 0) ? fName.charAt(fHotCh...
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinmenu.cc:13:
>./ymenuitem.h:47:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool isSeparator() { return getName() == null && getSubmenu() == 0; }
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmwinmenu.cc:20:
>In file included from ./wmframe.h:7:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmwinmenu.cc:28:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        YMenuItem(frame->getTitle(), -1, null, this, 0),
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmwinmenu.cc:32:37: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (fFrame->clientIcon() != null)
>                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>14 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmdialog.cc
>In file included from wmdialog.cc:11:
>In file included from ./wmdialog.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmdialog.cc:11:
>In file included from ./wmdialog.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmdialog.cc:11:
>In file included from ./wmdialog.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmdialog.cc:11:
>In file included from ./wmdialog.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmdialog.cc:11:
>In file included from ./wmdialog.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmdialog.cc:11:
>In file included from ./wmdialog.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmdialog.cc:11:
>In file included from ./wmdialog.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmdialog.cc:11:
>In file included from ./wmdialog.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmdialog.cc:11:
>In file included from ./wmdialog.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmdialog.cc:16:
>In file included from ./wmapp.h:6:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmdialog.cc:35:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (whereis != null) {
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>11 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmabout.cc
>In file included from wmabout.cc:12:
>In file included from ./wmabout.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmabout.cc:12:
>In file included from ./wmabout.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmabout.cc:12:
>In file included from ./wmabout.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmabout.cc:12:
>In file included from ./wmabout.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmabout.cc:12:
>In file included from ./wmabout.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmabout.cc:12:
>In file included from ./wmabout.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmabout.cc:12:
>In file included from ./wmabout.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmabout.cc:12:
>In file included from ./wmabout.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmabout.cc:12:
>In file included from ./wmabout.h:4:
>In file included from ./ydialog.h:4:
>In file included from ./wmclient.h:5:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmabout.cc:12:
>In file included from ./wmabout.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>10 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmswitch.cc
>In file included from wmswitch.cc:10:
>In file included from ./yimage.h:5:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmswitch.cc:10:
>In file included from ./yimage.h:5:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmswitch.cc:10:
>In file included from ./yimage.h:5:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmswitch.cc:10:
>In file included from ./yimage.h:5:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmswitch.cc:10:
>In file included from ./yimage.h:5:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmswitch.cc:10:
>In file included from ./yimage.h:5:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmswitch.cc:10:
>In file included from ./yimage.h:5:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmswitch.cc:10:
>In file included from ./yimage.h:5:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmswitch.cc:12:
>In file included from ./wmswitch.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmswitch.cc:15:
>In file included from ./wmframe.h:7:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:41:23: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (switchFont == null)
>                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:73:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fGradient = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:84:79: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>  ...cTitle = fActiveWindow ? fActiveWindow->client()->windowTitle() : null;
>                                                                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:96:39: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                int oWidth = title != null ? (int) switchFont->textWidth...
>                                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:101:28: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        tWidth = cTitle != null ? switchFont->textWidth(cTitle) : 0;
>                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>50 warnings generated.
>wmswitch.cc:166:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (switchbackPixbuf != null &&
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:167:24: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        !(fGradient != null &&
>                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:179:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fGradient != null)
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:183:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (switchbackPixmap != null)
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:200:68: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (!quickSwitchAllIcons && fActiveWindow->clientIcon() != null) {
>                                                                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:205:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (icon != null) {
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:240:23: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (cTitle != null) {
>                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:291:44: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                if (frame->clientIcon() != null) {
>                                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:308:41: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                            if (icon != null)
>                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:314:41: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                            if (icon != null)
>                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:353:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (cTitle != null) {
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmswitch.cc:360:40: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (frame->clientIcon() != null) {
>                                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmstatus.cc
>In file included from wmstatus.cc:12:
>In file included from ./wmstatus.h:6:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmstatus.cc:12:
>In file included from ./wmstatus.h:6:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmstatus.cc:12:
>In file included from ./wmstatus.h:6:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmstatus.cc:12:
>In file included from ./wmstatus.h:6:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmstatus.cc:12:
>In file included from ./wmstatus.h:6:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmstatus.cc:12:
>In file included from ./wmstatus.h:6:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmstatus.cc:12:
>In file included from ./wmstatus.h:6:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmstatus.cc:12:
>In file included from ./wmstatus.h:6:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmstatus.cc:12:
>In file included from ./wmstatus.h:6:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmstatus.cc:15:
>In file included from ./wmframe.h:7:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmstatus.cc:45:23: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (statusFont == null)
>                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmstatus.cc:61:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring status(null);
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmstatus.cc:65:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (switchbackPixmap != null)
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>13 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmoption.cc
>27 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmaction.cc
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmcontainer.cc
>In file included from wmoption.cc:10:
>In file included from ./wmoption.h:9:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmoption.cc:10:
>In file included from ./wmoption.h:9:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmoption.cc:10:
>In file included from ./wmoption.h:9:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmoption.cc:10:
>In file included from ./wmoption.h:9:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmoption.cc:10:
>In file included from ./wmoption.h:9:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmoption.cc:11:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmoption.cc:11:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmoption.cc:11:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmoption.cc:11:
>In file included from ./wmframe.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmoption.cc:11:
>In file included from ./wmframe.h:7:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmcontainer.cc:9wmoption.cc:391:20::
> warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>In file included from ./wmcontainer.h:4    if (optFile == null)
>                   ^~~~
>:
>./ref.h:22:15: note: expanded from macro 'null'
>In file included from ./ywindow.h:#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmcontainer.cc:9:
>In file included from ./wmcontainer.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmcontainer.cc:9:
>In file included from ./wmcontainer.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmcontainer.cc:9:
>In file included from ./wmcontainer.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmcontainer.cc:9:
>In file included from ./wmcontainer.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmcontainer.cc:9:
>In file included from ./wmcontainer.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmcontainer.cc:9:
>In file included from ./wmcontainer.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmcontainer.cc:9:
>In file included from ./wmcontainer.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmcontainer.cc:9:
>In file included from ./wmcontainer.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmcontainer.cc:11:
>In file included from ./wmframe.h:7:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>11 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmclient.cc
>10 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmmgr.cc
>In file included from wmclient.cc:8:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmclient.cc:8:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmclient.cc:8:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmclient.cc:8:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmclient.cc:8:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmclient.cc:8:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmclient.cc:8:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmclient.cc:8:
>In file included from ./wmclient.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmclient.cc:8:
>In file included from ./wmclient.h:5:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmmgr.cc:8:
>In file included from ./wmmgr.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmmgr.cc:8:
>In file included from ./wmmgr.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmmgr.cc:8:
>In file included from ./wmmgr.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmmgr.cc:8:
>In file included from ./wmmgr.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmmgr.cc:8:
>In file included from ./wmmgr.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmclient.cc:8:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmclient.cc:20:114: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>  ...*frame, Window win): YWindow(parent, win), fWindowTitle(null), fIconTitl...
>                                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmclient.cc:20:132: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>  ...win): YWindow(parent, win), fWindowTitle(null), fIconTitle(null), fWMWin...
>                                                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmclient.cc:20:153: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>  ...win), fWindowTitle(null), fIconTitle(null), fWMWindowRole(null), fWindow...
>                                                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmclient.cc:20:172: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>  ...fIconTitle(null), fWMWindowRole(null), fWindowRole(null) {
>                                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmclient.cc:24:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fWindowTitle = null;
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmclient.cc:25:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fIconTitle = null;
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmclient.cc:35:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fWindowRole = null;
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmclient.cc:36:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fWMWindowRole = null;
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmclient.cc:87:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fWMWindowRole = null;
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmclient.cc:88:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fWindowRole = null;
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmmgr.cc:8:
>In file included from ./wmmgr.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmmgr.cc:8:
>In file included from ./wmmgr.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmmgr.cc:8:
>In file included from ./wmmgr.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmmgr.cc:8:
>In file included from ./wmmgr.h:5:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmclient.cc:593:39: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (title == 0 || fWindowTitle == null || !fWindowTitle.equals(title)) {
>                                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmclient.cc:600:37: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (title == 0 || fIconTitle == null || !fIconTitle.equals(title)) {
>                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmmgr.cc:11:
>In file included from ./atray.h:14:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmclient.cc:1542:16: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return null;
>               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmmgr.cc:16:
>In file included from ./objmenu.h:5:
>./ymenuitem.h:25:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (fName != null && fHotCharPos >= 0) ? fName.charAt(fHotCh...
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmmgr.cc:16:
>In file included from ./objmenu.h:5:
>./ymenuitem.h:47:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool isSeparator() { return getName() == null && getSubmenu() == 0; }
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmmgr.cc:1293:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        WindowOption wo(null);
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>23 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmapp.cc
>In file included from wmapp.cc:10:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmapp.cc:10:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmapp.cc:10:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmapp.cc:10:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmapp.cc:10:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmapp.cc:10:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmapp.cc:10:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmapp.cc:10:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmapp.cc:10:
>In file included from ./atray.h:13:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmapp.cc:10:
>In file included from ./atray.h:14:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmapp.cc:15:
>In file included from ./wmprog.h:7:
>In file included from ./objmenu.h:5:
>./ymenuitem.h:25:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (fName != null && fHotCharPos >= 0) ? fName.charAt(fHotCh...
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmapp.cc:15:
>In file included from ./wmprog.h:7:
>In file included from ./objmenu.h:5:
>./ymenuitem.h:47:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool isSeparator() { return getName() == null && getSubmenu() == 0; }
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:302:28: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        upath fonts_dirDir(null);
>                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:304:30: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (fonts_dirPath != null)
>                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:327:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (fonts_dirDir != null) { // =========================== buil...
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:424:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (gradient == null)
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:437:57: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ref<YResourcePaths> paths = YResourcePaths::subdirs(null, true);
>                                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:557:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameT[0][0] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:559:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameL[0][0] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:561:47: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT( rgbFrameR[0][0] == null))
>                                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:563:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameB[0][0] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:565:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameT[0][1] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:567:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameL[0][1] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:569:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameR[0][1] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:571:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameB[0][1] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:574:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameT[1][0] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:576:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameL[1][0] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:578:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameR[1][0] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:580:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameB[1][0] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:582:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameT[1][1] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:584:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameL[1][1] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:586:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameR[1][1] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:588:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (TEST_GRADIENT(rgbFrameB[1][1] == null))
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:642:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>      if (depthPixmap[0]==null)            depthPixmap[0] = paths->loadP...
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:643:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>      if (closePixmap[0]==null)            closePixmap[0] = paths->loadP...
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:644:30: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>      if (maximizePixmap[0]==null)      maximizePixmap[0] = paths->loadP...
>                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:645:30: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>      if (minimizePixmap[0]==null)      minimizePixmap[0] = paths->loadP...
>                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:646:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>      if (restorePixmap[0]==null)        restorePixmap[0] = paths->loadP...
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:647:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>      if (hidePixmap[0]==null)              hidePixmap[0] = paths->loadP...
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:648:28: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>      if (rollupPixmap[0]==null)          rollupPixmap[0] = paths->loadP...
>                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:649:30: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>      if (rolldownPixmap[0]==null)      rolldownPixmap[0] = paths->loadP...
>                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:652:39: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (TEST_GRADIENT(logoutPixbuf == null))
>                                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:654:43: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (TEST_GRADIENT(switchbackPixbuf == null))
>                                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:656:41: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (TEST_GRADIENT(menubackPixbuf == null))
>                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:658:40: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (TEST_GRADIENT(menuselPixbuf == null))
>                                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:660:40: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (TEST_GRADIENT(menusepPixbuf == null))
>                                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:664:41: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (TEST_GRADIENT(listbackPixbuf == null) &&
>                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:665:66: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        (listbackPixmap = paths->loadPixmap(0, "listbg.xpm")) == null)
>                                                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:668:43: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (TEST_GRADIENT(dialogbackPixbuf == null) &&
>                                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:669:70: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        (dialogbackPixmap = paths->loadPixmap(0, "dialogbg.xpm")) == null)
>                                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:671:40: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (TEST_GRADIENT(buttonIPixbuf == null) &&
>                                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:672:66: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        (buttonIPixmap = paths->loadPixmap(0, "buttonI.xpm")) == null)
>                                                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:674:40: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (TEST_GRADIENT(buttonAPixbuf == null) &&
>                                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:675:66: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        (buttonAPixmap = paths->loadPixmap(0, "buttonA.xpm")) == null)
>                                                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:679:43: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (TEST_GRADIENT(toolbuttonPixbuf == null) &&
>                                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:681:64: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>         paths->loadPixmap("taskbar/", "toolbuttonbg.xpm")) == null)
>                                                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:683:47: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        IF_CONFIG_GRADIENTS (buttonIPixbuf != null,
>                                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:37:45: note: expanded from macro 'IF_CONFIG_GRADIENTS'
>#define IF_CONFIG_GRADIENTS(Cond, Stmt) if (Cond) { Stmt; }
>                                            ^~~~
>wmapp.cc:687:48: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (TEST_GRADIENT(workspacebuttonPixbuf == null) &&
>                                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:689:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>         paths->loadPixmap("taskbar/", "workspacebuttonbg.xpm")) == null)
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:691:47: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        IF_CONFIG_GRADIENTS (buttonIPixbuf != null,
>                                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:37:45: note: expanded from macro 'IF_CONFIG_GRADIENTS'
>#define IF_CONFIG_GRADIENTS(Cond, Stmt) if (Cond) { Stmt; }
>                                            ^~~~
>wmapp.cc:695:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (TEST_GRADIENT(workspacebuttonactivePixbuf == null) &&
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmapp.cc:697:73: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>         paths->loadPixmap("taskbar/", "workspacebuttonactive.xpm")) == null)
>                                                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:699:47: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        IF_CONFIG_GRADIENTS (buttonAPixbuf != null,
>                                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:37:45: note: expanded from macro 'IF_CONFIG_GRADIENTS'
>#define IF_CONFIG_GRADIENTS(Cond, Stmt) if (Cond) { Stmt; }
>                                            ^~~~
>wmapp.cc:705:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (logoutPixmap != null) {
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:709:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (switchbackPixmap != null) {
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:714:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (menubackPixmap != null) {
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:718:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (menusepPixmap != null)
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:720:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (menuselPixmap != null)
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:724:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (listbackPixmap != null) {
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:730:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (dialogbackPixmap != null) {
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:735:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (buttonIPixmap != null)
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:737:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (buttonAPixmap != null)
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:758:51: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            logoutMenu->addItem(_("_Logout"), -2, null, actionLogout)->s...
>                                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:759:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            logoutMenu->addItem(_("_Cancel logout"), -2, null, actionCan...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:771:65: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                logoutMenu->addItem(_("Lock _Workstation"), -2, null, ac...
>                                                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:773:55: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                logoutMenu->addItem(_("Re_boot"), -2, null, actionReboot);
>                                                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:775:57: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                logoutMenu->addItem(_("Shut_down"), -2, null, actionShutdown);
>                                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:779:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            logoutMenu->addItem(_("Restart _Icewm"), -2, null, actionRestart);
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:782:82: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>  ...smActionListener, _("Restart _Xterm"), null, true, 0, "xterm", noargs);
>                                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:797:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    layerMenu->addItem(_("_Menu"),       -2, null, layerActionSet[WinLay...
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:798:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    layerMenu->addItem(_("_Above Dock"), -2, null, layerActionSet[WinLay...
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:799:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    layerMenu->addItem(_("_Dock"),       -2, null, layerActionSet[WinLay...
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:800:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    layerMenu->addItem(_("_OnTop"),      -2, null, layerActionSet[WinLay...
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:801:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    layerMenu->addItem(_("_Normal"),     -2, null, layerActionSet[WinLay...
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:802:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    layerMenu->addItem(_("_Below"),      -2, null, layerActionSet[WinLay...
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:803:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    layerMenu->addItem(_("D_esktop"),    -2, null, layerActionSet[WinLay...
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:811:33: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        moveMenu->addItem(s, 0, null, workspaceActionMoveTo[w]);
>                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:859:50: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        windowMenu->addItem(_("Tray _icon"), -2, null, actionToggleTray);
>                                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1242:23: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (winOptFile == null)
>                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1246:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (keysFile == null)
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1258:23: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (winOptFile != null)
>                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1260:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    winOptFile = null;
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1264:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (keysFile != null)
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1426:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    closePixmap[0] = null;
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1427:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    depthPixmap[0] = null;
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1428:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    minimizePixmap[0] = null;
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1429:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    maximizePixmap[0] = null;
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1430:24: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    restorePixmap[0] = null;
>                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1431:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    hidePixmap[0] = null;
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1432:23: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    rollupPixmap[0] = null;
>                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1433:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    rolldownPixmap[0] = null;
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1434:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    menubackPixmap = null;
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1435:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    menuselPixmap = null;
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1436:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    menusepPixmap = null;
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1437:24: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    switchbackPixmap = null;
>                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1438:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    logoutPixmap = null;
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1441:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    menubackPixbuf = null;
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1442:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    menuselPixbuf = null;
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1443:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    menusepPixbuf = null;
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1448:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        taskbuttonactivePixmap = null;
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmapp.cc:1449:37: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        taskbuttonminimizedPixmap = null;
>                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>13 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmframe.cc
>In file included from wmframe.cc:9:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmframe.cc:9:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmframe.cc:9:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmframe.cc:9:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmframe.cc:9:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmframe.cc:9:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmframe.cc:9:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmframe.cc:9:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmframe.cc:9:
>In file included from ./wmframe.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmframe.cc:9:
>In file included from ./wmframe.h:7:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:103:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fFrameIcon = null;
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:269:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fFrameIcon = null;
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:1940:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if ((frameT[t][n] != null || TEST_GRADIENT(rgbFrameT[t][n] !...
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:1940:75: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>  ...if ((frameT[t][n] != null || TEST_GRADIENT(rgbFrameT[t][n] != null)) &&
>                                                                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmframe.cc:1941:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                (frameL[t][n] != null || TEST_GRADIENT(rgbFrameL[t][n] !...
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:1941:75: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>  ...(frameL[t][n] != null || TEST_GRADIENT(rgbFrameL[t][n] != null)) &&
>                                                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmframe.cc:1942:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                (frameR[t][n] != null || TEST_GRADIENT(rgbFrameR[t][n] !...
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:1942:75: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>  ...(frameR[t][n] != null || TEST_GRADIENT(rgbFrameR[t][n] != null)) &&
>                                                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmframe.cc:1943:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                (frameB[t][n] != null || TEST_GRADIENT(rgbFrameB[t][n] !...
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:1943:75: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>  ...(frameB[t][n] != null || TEST_GRADIENT(rgbFrameB[t][n] != null)) &&
>                                                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>./ypaint.h:36:30: note: expanded from macro 'TEST_GRADIENT'
>#define TEST_GRADIENT(Cond) (Cond)
>                             ^~~~
>wmframe.cc:1944:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                frameTL[t][n] != null && frameTR[t][n] != null &&
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:1944:59: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                frameTL[t][n] != null && frameTR[t][n] != null &&
>                                                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:1945:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                frameBL[t][n] != null && frameBR[t][n] != null) {
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:1945:59: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                frameBL[t][n] != null && frameBR[t][n] != null) {
>                                                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:1981:41: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    if (frameT[t][n] != null)
>                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:1991:41: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    if (frameL[t][n] != null) g.repVert(frameL[t][n],
>                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2000:41: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    if (frameR[t][n] != null) g.repVert(frameR[t][n],
>                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2010:41: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    if (frameB[t][n] != null) g.repHorz(frameB[t][n],
>                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2227:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    WindowOption wo(null);
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2267:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (klass != null) {
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2268:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (name != null) {
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2274:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (name != null) {
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2275:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (role != null) {
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2281:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (role != null)
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2283:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    list->mergeWindowOption(opt, null, remove);
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2289:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    WindowOption wo(null);
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2313:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ref<YImage> small = null;
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2314:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ref<YImage> large = null;
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2315:24: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ref<YImage> huge = null;
>                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2318:16: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return null;
>               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2375:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            img = null;
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2386:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            } else if (w <= YIcon::hugeSize() || huge == null || huge->w...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2394:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (small != null || large != null || huge != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2394:35: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (small != null || large != null || huge != null)
>                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2394:51: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (small != null || large != null || huge != null)
>                                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2432:73: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    if (e[0] == sizes[i] && e[0] == e[1] && icons[i] == null)
>                                                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2448:28: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (largestIcon != null) {
>                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2450:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                if (icons[i] == null && sizes[i] < largestIconSize)
>                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2488:23: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fFrameIcon != null && !(fFrameIcon->small() != null || fFrameIco...
>                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2488:56: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fFrameIcon != null && !(fFrameIcon->small() != null || fFrameIco...
>                                                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2488:87: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>  ...null && !(fFrameIcon->small() != null || fFrameIcon->large() != null)) {
>                                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2489:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fFrameIcon = null;
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:2492:23: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fFrameIcon == null) {
>                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmframe.cc:3310:35: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (f->getClientIcon() != null)
>                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>54 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmbutton.cc
>In file included from wmbutton.cc:10:
>In file included from ./wmbutton.h:4:
>In file included from ./yactionbutton.h:4:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmbutton.cc:10:
>In file included from ./wmbutton.h:4:
>In file included from ./yactionbutton.h:4:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmbutton.cc:10:
>In file included from ./wmbutton.h:4:
>In file included from ./yactionbutton.h:4:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmbutton.cc:10:
>In file included from ./wmbutton.h:4:
>In file included from ./yactionbutton.h:4:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmbutton.cc:10:
>In file included from ./wmbutton.h:4:
>In file included from ./yactionbutton.h:4:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmbutton.cc:10:
>In file included from ./wmbutton.h:4:
>In file included from ./yactionbutton.h:4:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmbutton.cc:10:
>In file included from ./wmbutton.h:4:
>In file included from ./yactionbutton.h:4:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmbutton.cc:10:
>In file included from ./wmbutton.h:4:
>In file included from ./yactionbutton.h:4:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmbutton.cc:10:
>In file included from ./wmbutton.h:4:
>In file included from ./yactionbutton.h:4:
>In file included from ./ybutton.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmbutton.cc:13:
>In file included from ./wmframe.h:7:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmbutton.cc:132:16: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return null;
>               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmbutton.cc:161:53: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        (fAction == 0) ? getFrame()->clientIcon() : null;
>                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmbutton.cc:165:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (pixmap == null) pixmap = getPixmap(0);
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmbutton.cc:178:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (icon != null && showFrameIcon)
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmbutton.cc:186:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (pixmap != null)
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmbutton.cc:229:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (icon != null && showFrameIcon)
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmbutton.cc:235:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (pixmap != null)
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmbutton.cc:254:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (icon != null && showFrameIcon)
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmbutton.cc:265:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (pixmap != null)
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmbutton.cc:276:23: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (pixmap != null) {
>                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmbutton.cc:277:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if ( getPixmap(1) != null ) {
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmbutton.cc:294:37: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (fAction == 0 && icon != null && showFrameIcon)
>                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>22 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmminiicon.cc
>In file included from wmminiicon.cc:11:
>In file included from ./wmminiicon.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmminiicon.cc:11:
>In file included from ./wmminiicon.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmminiicon.cc:11:
>In file included from ./wmminiicon.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmminiicon.cc:11:
>In file included from ./wmminiicon.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmminiicon.cc:11:
>In file included from ./wmminiicon.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmminiicon.cc:11:
>In file included from ./wmminiicon.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmminiicon.cc:11:
>In file included from ./wmminiicon.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmminiicon.cc:11:
>In file included from ./wmminiicon.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmminiicon.cc:11:
>In file included from ./wmminiicon.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmminiicon.cc:13:
>In file included from ./wmframe.h:7:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmminiicon.cc:28:32: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (minimizedWindowFont == null)
>                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmminiicon.cc:75:37: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (getFrame()->clientIcon() != null) {
>                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmminiicon.cc:82:16: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (str == null || str.length() == 0)
>               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmminiicon.cc:85:16: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (str != null) {
>               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmminiicon.cc:88:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (font != null) {
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>15 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmtitle.cc
>In file included from wmtitle.cc:9:
>In file included from ./wmtitle.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtitle.cc:9:
>In file included from ./wmtitle.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtitle.cc:9:
>In file included from ./wmtitle.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtitle.cc:9:
>In file included from ./wmtitle.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtitle.cc:9:
>In file included from ./wmtitle.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtitle.cc:9:
>In file included from ./wmtitle.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtitle.cc:9:
>In file included from ./wmtitle.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtitle.cc:9:
>In file included from ./wmtitle.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtitle.cc:9:
>In file included from ./wmtitle.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmtitle.cc:11:
>In file included from ./wmframe.h:7:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:49:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (titleFont == null)
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:184:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    int tlen = title != null ? titleFont->textWidth(title) : 0;
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:218:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    int tlen = title != null ? titleFont->textWidth(title) : 0;
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:284:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (titleL[pi] != null) {
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:289:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (titleR[pi] != null) {
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:294:43: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        int lLeft(onLeft + (titleP[pi] != null ? (int)titleP[pi]->width() : 0)),
>                                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:295:45: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            lRight(onRight - (titleM[pi] != null ? (int)titleM[pi]->widt...
>                                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:306:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (rgbTitleT[pi] != null) {
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:314:35: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                if (titleT[pi] != null)
>                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:320:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (titleP[pi] != null) {
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:324:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (titleM[pi] != null) {
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:331:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (rgbTitleS[pi] != null) {
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:338:35: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                if (titleS[pi] != null)
>                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:345:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (rgbTitleB[pi] != null) {
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:355:35: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                if (titleB[pi] != null)
>                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:361:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (titleJ[pi] != null)
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:363:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (titleQ[pi] != null)
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:373:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (title != null && tlen) {
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:402:35: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    if (pixmap != null && b->getPixmap(1) != null ) {
>                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:402:62: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    if (pixmap != null && b->getPixmap(1) != null ) {
>                                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:419:36: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    if ( pixmap != null && b->getPixmap(1) != null ) {
>                                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:419:63: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    if ( pixmap != null && b->getPixmap(1) != null ) {
>                                                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:433:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        int tlen = title != null ? titleFont->textWidth(title) : 0;
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:439:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (titleL[pi] != null) {
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:444:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (titleR[pi] != null) {
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:449:43: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        int lLeft(onLeft + (titleP[pi] != null ? (int)titleP[pi]->width() : 0)),
>                                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:450:45: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            lRight(onRight - (titleM[pi] != null ? (int)titleM[pi]->widt...
>                                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:459:45: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (lLeft < lRight && titleT[pi] != null)
>                                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:464:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (titleP[pi] != null) {
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:468:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (titleM[pi] != null) {
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:473:45: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (onLeft < lLeft && titleS[pi] != null)
>                                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:478:47: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (lRight < onRight && titleB[pi] != null)
>                                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:483:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (titleJ[pi] != null)
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmtitle.cc:485:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (titleQ[pi] != null)
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>111 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c movesize.cc
>In file included from movesize.cc:10:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from movesize.cc:10:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from movesize.cc:10:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from movesize.cc:10:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from movesize.cc:10:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from movesize.cc:10:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from movesize.cc:10:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from movesize.cc:10:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from movesize.cc:10:
>In file included from ./wmframe.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from movesize.cc:10:
>In file included from ./wmframe.h:7:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>44 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c themes.cc
>In file included from themes.cc:9:
>In file included from ./themes.h:6:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from themes.cc:9:
>In file included from ./themes.h:6:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from themes.cc:9:
>In file included from ./themes.h:6:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from themes.cc:9:
>In file included from ./themes.h:6:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from themes.cc:9:
>In file included from ./themes.h:6:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from themes.cc:9:
>In file included from ./themes.h:6:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from themes.cc:9:
>In file included from ./themes.h:6:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from themes.cc:9:
>In file included from ./themes.h:6:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from themes.cc:9:
>In file included from ./themes.h:6:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from themes.cc:9:
>In file included from ./themes.h:6:
>In file included from ./objmenu.h:5:
>./ymenuitem.h:25:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (fName != null && fHotCharPos >= 0) ? fName.charAt(fHotCh...
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from themes.cc:9:
>In file included from ./themes.h:6:
>In file included from ./objmenu.h:5:
>./ymenuitem.h:47:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool isSeparator() { return getName() == null && getSubmenu() == 0; }
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>10 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c decorate.cc
>In file included from themes.cc:21:
>In file included from ./wmapp.h:6:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from themes.cc:22:
>./ascii.h:1:9: warning: '__ASCII_H' is used as a header guard here, followed by
>      #define of a different macro [-Wheader-guard]
>#ifndef __ASCII_H
>        ^~~~~~~~~
>./ascii.h:2:9: note: '__ASCIIH_' is defined here; did you mean '__ASCII_H'?
>#define __ASCIIH_
>        ^~~~~~~~~
>        __ASCII_H
>themes.cc:39:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    DObject(app, label, null), fTheme(theme)
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>themes.cc:49:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fTheme == null)
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>themes.cc:183:74: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>  ...YMenuItem *smItem = new YMenuItem(smname, 0, null, NULL, smenu);
>                                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from decorate.cc:8:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from decorate.cc:8:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from decorate.cc:8:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from decorate.cc:8:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from decorate.cc:8:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from decorate.cc:8:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from decorate.cc:8:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from decorate.cc:8:
>In file included from ./wmframe.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from decorate.cc:8:
>In file included from ./wmframe.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from decorate.cc:8:
>In file included from ./wmframe.h:7:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from decorate.cc:15:
>./ymenuitem.h:25:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (fName != null && fHotCharPos >= 0) ? fName.charAt(fHotCh...
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from decorate.cc:15:
>./ymenuitem.h:47:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool isSeparator() { return getName() == null && getSubmenu() == 0; }
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:234:44: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            const int xTL(frameTL[t][a] != null ? frameTL[t][a]->width() : 0),
>                                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:236:39: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    (frameTR[t][a] != null ? frameTR[t][a]->width() : 0)),
>                                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:237:38: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                xBL(frameBL[t][a] != null ? frameBL[t][a]->width() : 0),
>                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:239:39: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    (frameBR[t][a] != null ? frameBR[t][a]->width() : 0));
>                                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:240:44: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            const int yTL(frameTL[t][a] != null ? frameTL[t][a]->height() : 0),
>                                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:242:39: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    (frameBL[t][a] != null ? frameBL[t][a]->height() : 0)),
>                                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:243:38: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                yTR(frameTR[t][a] != null ? frameTR[t][a]->height() : 0),
>                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:245:39: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    (frameBR[t][a] != null ? frameBR[t][a]->height() : 0));
>                                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:247:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (frameTL[t][a] != null) {
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:256:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (frameTR[t][a] != null) {
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:265:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (frameBL[t][a] != null) {
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:274:34: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (frameBR[t][a] != null) {
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:284:33: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (frameT[t][a] != null)
>                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:288:33: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (frameB[t][a] != null)
>                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:292:33: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (frameL[t][a] != null)
>                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:296:33: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (frameR[t][a] != null)
>                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:377:64: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                          showFrameIcon) || b->getPixmap(0) == null ?
>                                                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:384:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        const unsigned bw(b->getPixmap(0) != null ? b->getPixmap(0)->wid...
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:461:32: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        int xPos(titleJ[pi] != null ? titleJ[pi]->width() : 0);
>                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>decorate.cc:487:33: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                 (titleQ[pi] != null ? titleQ[pi]->width() : 0));
>                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>16 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c browse.cc
>In file included from browse.cc:11:
>In file included from ./obj.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from browse.cc:11:
>In file included from ./obj.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from browse.cc:11:
>In file included from ./obj.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from browse.cc:11:
>In file included from ./obj.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from browse.cc:11:
>In file included from ./obj.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from browse.cc:11:
>In file included from ./obj.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from browse.cc:11:
>In file included from ./obj.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from browse.cc:11:
>In file included from ./obj.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from browse.cc:12:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from browse.cc:12:
>In file included from ./objmenu.h:5:
>./ymenuitem.h:25:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (fName != null && fHotCharPos >= 0) ? fName.charAt(fHotCh...
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from browse.cc:12:
>In file included from ./objmenu.h:5:
>./ymenuitem.h:47:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool isSeparator() { return getName() == null && getSubmenu() == 0; }
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>browse.cc:65:57: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    DFile *pfile = new DFile(app, name, null, npath);
>                                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>browse.cc:70:37: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                        if (file == null)
>                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>browse.cc:72:39: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                        if (folder == null)
>                                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>browse.cc:78:43: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                            if (folder != null)
>                                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>browse.cc:81:41: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                            if (file != null)
>                                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>32 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c wmprog.cc
>16 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c atasks.cc
>In file included from atasks.cc:7:
>In file included from ./atasks.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atasks.cc:7:
>In file included from ./atasks.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atasks.cc:7:
>In file included from ./atasks.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atasks.cc:7:
>In file included from ./atasks.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atasks.cc:7:
>In file included from ./atasks.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmprog.cc:13:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmprog.cc:13:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmprog.cc:13:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmprog.cc:13:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmprog.cc:13:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atasks.cc:7:
>In file included from ./atasks.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atasks.cc:7:
>In file included from ./atasks.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atasks.cc:7:
>In file included from ./atasks.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmprog.cc:13:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmprog.cc:13:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmprog.cc:13:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmprog.cc:13:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmprog.cc:13:
>In file included from ./objmenu.h:5:
>./ymenuitem.h:25:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (fName != null && fHotCharPos >= 0) ? fName.charAt(fHotCh...
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmprog.cc:13:
>In file included from ./objmenu.h:5:
>./ymenuitem.h:47:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool isSeparator() { return getName() == null && getSubmenu() == 0; }
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atasks.cc:7:
>In file included from ./atasks.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atasks.cc:7:
>In file included from ./atasks.h:5:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from wmprog.cc:22:
>In file included from ./wmapp.h:6:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:36:38: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    YMenuItem(object->getName(), -3, null, this, 0)
>                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:40:30: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (object->getIcon() != null)
>                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:96:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (item && icon != null)
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:109:13: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fIcon = null;
>            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:159:16: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (exe != null) {
>               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:162:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (fullname == null) {
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:246:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (path != null)
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:410:33: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                if (fullPath != null) {
>                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:452:33: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                if (fullPath != null) {
>                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:497:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    null,
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:589:38: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (!autoReloadMenus && fPath != null)
>                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:596:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fPath == null) {
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:600:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (np == null || np.equals(fPath)) {
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:604:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            np = null;
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:607:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fPath == null) {
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:624:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fPath != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:741:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fCommand != null)
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:822:45: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            DFile *file = new DFile(app, p, null, p);
>                                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:827:31: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                if (folder != null)
>                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:892:13: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            null,
>            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>wmprog.cc:942:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            addItem(_("_Logout..."), -2, null, actionLogout);
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atasks.cc:197:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (bgGrad != null)
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atasks.cc:201:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (bgPix != null)
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atasks.cc:211:43: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (taskBarShowWindowIcons && icon != null) {
>                                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atasks.cc:221:16: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (str == null || str.length() == 0)
>               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atasks.cc:224:16: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (str != null) {
>               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atasks.cc:228:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (font != null) {
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atasks.cc:235:51: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (taskBarShowWindowIcons && icon != null) {
>                                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atasks.cc:497:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (gradient != null)
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atasks.cc:501:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (taskbackPixmap != null)
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>19 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c aworkspaces.cc
>In file included from aworkspaces.cc:6:
>In file included from ./aworkspaces.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aworkspaces.cc:6:
>In file included from ./aworkspaces.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aworkspaces.cc:6:
>In file included from ./aworkspaces.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aworkspaces.cc:6:
>In file included from ./aworkspaces.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aworkspaces.cc:6:
>In file included from ./aworkspaces.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aworkspaces.cc:6:
>In file included from ./aworkspaces.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aworkspaces.cc:6:
>In file included from ./aworkspaces.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aworkspaces.cc:6:
>In file included from ./aworkspaces.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aworkspaces.cc:6:
>In file included from ./aworkspaces.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aworkspaces.cc:7:
>In file included from ./wmtaskbar.h:8:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aworkspaces.cc:119:61: warning: binding dereferenced null pointer to reference
>      has undefined behavior [-Wnull-dereference]
>        ref<YResourcePaths> paths = YResourcePaths::subdirs(null, false);
>                                                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aworkspaces.cc:133:34: warning: binding dereferenced null pointer to reference
>      has undefined behavior [-Wnull-dereference]
>                    if (image != null)
>                                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aworkspaces.cc:203:31: warning: binding dereferenced null pointer to reference
>      has undefined behavior [-Wnull-dereference]
>        ? activeButtonFont != null
>                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aworkspaces.cc:208:31: warning: binding dereferenced null pointer to reference
>      has undefined behavior [-Wnull-dereference]
>        ? normalButtonFont != null
>                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aworkspaces.cc:319:83: warning: binding dereferenced null pointer to reference
>      has undefined behavior [-Wnull-dereference]
>  ...wh > smallIconSize+1 && (icon = yfw->clientIcon()) != null &&
>                                                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aworkspaces.cc:320:46: warning: binding dereferenced null pointer to reference
>      has undefined behavior [-Wnull-dereference]
>                            icon->small() != null) {
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>33 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c amailbox.cc
>In file included from amailbox.cc:15:
>In file included from ./amailbox.h:6:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from amailbox.cc:15:
>In file included from ./amailbox.h:6:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from amailbox.cc:15:
>In file included from ./amailbox.h:6:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from amailbox.cc:15:
>In file included from ./amailbox.h:6:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from amailbox.cc:15:
>In file included from ./amailbox.h:6:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from amailbox.cc:15:
>In file included from ./amailbox.h:6:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from amailbox.cc:15:
>In file included from ./amailbox.h:6:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from amailbox.cc:15:
>In file included from ./amailbox.h:6:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from amailbox.cc:15:
>In file included from ./amailbox.h:6:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from amailbox.cc:20:
>In file included from ./wmapp.h:6:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>amailbox.cc:49:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fURL != null && fURL->scheme() != null) {
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>amailbox.cc:49:43: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fURL != null && fURL->scheme() != null) {
>                                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>amailbox.cc:60:39: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                htons(fURL->port() != null? atoi(cstring(fURL->port()).c_str())
>                                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>/usr/include/netinet/in.h:120:26: note: expanded from macro 'htons'
>#define htons(x)        __htons(x)
>                                ^
>/usr/include/x86/endian.h:129:30: note: expanded from macro '__htons'
>#define __htons(x)      __bswap16(x)
>                                  ^
>/usr/include/x86/endian.h:76:37: note: expanded from macro '__bswap16'
>        ((__uint16_t)(__builtin_constant_p(x) ? \
>                                           ^
>amailbox.cc:60:39: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                htons(fURL->port() != null? atoi(cstring(fURL->port()).c_str())
>                                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>/usr/include/netinet/in.h:120:26: note: expanded from macro 'htons'
>#define htons(x)        __htons(x)
>                                ^
>/usr/include/x86/endian.h:129:30: note: expanded from macro '__htons'
>#define __htons(x)      __bswap16(x)
>                                  ^
>/usr/include/x86/endian.h:77:53: note: expanded from macro '__bswap16'
>            __bswap16_gen((__uint16_t)(x)) : __bswap16_var(x)))
>                                                           ^
>amailbox.cc:63:33: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (fURL->host() != null) { /// !!! fix, need nonblocking resolve
>                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>amailbox.cc:123:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (fURL->path() == null)
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>amailbox.cc:275:53: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                                   (fURL->path() == null || fURL->path()...
>                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>amailbox.cc:283:53: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                                   (fURL->path() == null || fURL->path()...
>                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>amailbox.cc:341:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fMailBox != null) {
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>amailbox.cc:383:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (pixmap == null || pixmap->mask()) {
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>amailbox.cc:387:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (gradient != null)
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>amailbox.cc:391:35: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (taskbackPixmap != null)
>                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>amailbox.cc:399:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (pixmap != null)
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>16 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c aclock.cc
>In file included from aclock.cc:15:
>In file included from ./aclock.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aclock.cc:15:
>In file included from ./aclock.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aclock.cc:15:
>In file included from ./aclock.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aclock.cc:15:
>In file included from ./aclock.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aclock.cc:15:
>In file included from ./aclock.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aclock.cc:15:
>In file included from ./aclock.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aclock.cc:15:
>In file included from ./aclock.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aclock.cc:15:
>In file included from ./aclock.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aclock.cc:15:
>In file included from ./aclock.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aclock.cc:16:
>In file included from ./wmtaskbar.h:8:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aclock.cc:51:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (clockFont == null)
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aclock.cc:200:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (gradient != null)
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aclock.cc:205:31: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (taskbackPixmap != null) {
>                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aclock.cc:223:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (p != null) {
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aclock.cc:308:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (p != null)
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aclock.cc:325:14: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (p != null && p->mask()) {
>             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>23 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c acpustatus.cc
>16 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c apppstatus.cc
>In file included from acpustatus.cc:22:
>In file included from ./wmapp.h:4:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from acpustatus.cc:22:
>In file included from ./wmapp.h:4:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from acpustatus.cc:22:
>In file included from ./wmapp.h:4:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from acpustatus.cc:22:
>In file included from ./wmapp.h:4:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from acpustatus.cc:22:
>In file included from ./wmapp.h:4:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from acpustatus.cc:22:
>In file included from ./wmapp.h:4:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from acpustatus.cc:22:
>In file included from ./wmapp.h:4:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from acpustatus.cc:22:
>In file included from ./wmapp.h:4:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from acpustatus.cc:22:
>In file included from ./wmapp.h:4:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:6:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from acpustatus.cc:22:
>In file included from ./wmapp.h:6:
>In file included from ./ymsgbox.h:4:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>acpustatus.cc:196:33: warning: binding dereferenced null pointer to reference
>      has undefined behavior [-Wnull-dereference]
>                if (gradient != null)
>                                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>acpustatus.cc:201:43: warning: binding dereferenced null pointer to reference
>      has undefined behavior [-Wnull-dereference]
>                    if (taskbackPixmap != null)
>                                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from apppstatus.cc:21:
>In file included from ./wmtaskbar.h:5:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from apppstatus.cc:21:
>In file included from ./wmtaskbar.h:5:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from apppstatus.cc:21:
>In file included from ./wmtaskbar.h:5:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from apppstatus.cc:21:
>In file included from ./wmtaskbar.h:5:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from apppstatus.cc:21:
>In file included from ./wmtaskbar.h:5:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from apppstatus.cc:21:
>In file included from ./wmtaskbar.h:5:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from apppstatus.cc:21:
>In file included from ./wmtaskbar.h:5:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from apppstatus.cc:21:
>In file included from ./wmtaskbar.h:5:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from apppstatus.cc:21:
>In file included from ./wmtaskbar.h:5:
>In file included from ./ybutton.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from apppstatus.cc:21:
>In file included from ./wmtaskbar.h:8:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>apppstatus.cc:274:37: warning: binding dereferenced null pointer to reference
>      has undefined behavior [-Wnull-dereference]
>                    if (gradient != null)
>                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>apppstatus.cc:279:47: warning: binding dereferenced null pointer to reference
>      has undefined behavior [-Wnull-dereference]
>                        if (taskbackPixmap != null)
>                                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>12 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c aaddressbar.cc
>In file included from aaddressbar.cc:10:
>In file included from ./aaddressbar.h:6:
>In file included from ./yinputline.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aaddressbar.cc:10:
>In file included from ./aaddressbar.h:6:
>In file included from ./yinputline.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aaddressbar.cc:10:
>In file included from ./aaddressbar.h:6:
>In file included from ./yinputline.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aaddressbar.cc:10:
>In file included from ./aaddressbar.h:6:
>In file included from ./yinputline.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aaddressbar.cc:10:
>In file included from ./aaddressbar.h:6:
>In file included from ./yinputline.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>12 warnings generated.
>In file included from aaddressbar.cc:10:
>In file included from ./aaddressbar.h:6:
>In file included from ./yinputline.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aaddressbar.cc:10:
>In file included from ./aaddressbar.h:6:
>In file included from ./yinputline.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aaddressbar.cc:10:
>In file included from ./aaddressbar.h:6:
>In file included from ./yinputline.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aaddressbar.cc:10:
>In file included from ./aaddressbar.h:6:
>In file included from ./yinputline.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c objbar.cc
>In file included from objbar.cc:9:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from objbar.cc:9:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from objbar.cc:9:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from objbar.cc:9:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from objbar.cc:9:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from objbar.cc:9:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from objbar.cc:9:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from objbar.cc:9:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from objbar.cc:9:
>In file included from ./objmenu.h:4:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from objbar.cc:9:
>In file included from ./objmenu.h:5:
>./ymenuitem.h:25:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (fName != null && fHotCharPos >= 0) ? fName.charAt(fHotCh...
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from objbar.cc:9:
>In file included from ./objmenu.h:5:
>./ymenuitem.h:47:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool isSeparator() { return getName() == null && getSubmenu() == 0; }
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>9 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c aapm.cc
>In file included from objbar.cc:17:
>In file included from ./wmtaskbar.h:8:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>objbar.cc:46:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (icon != null) {
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>objbar.cc:72:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (gradient != null)
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>objbar.cc:76:31: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (taskbackPixmap != null)
>                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>objbar.cc:117:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    return font != null ? font : font =
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aapm.cc:14:
>In file included from ./aapm.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aapm.cc:14:
>In file included from ./aapm.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aapm.cc:14:
>In file included from ./aapm.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aapm.cc:14:
>In file included from ./aapm.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aapm.cc:14:
>In file included from ./aapm.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aapm.cc:14:
>In file included from ./aapm.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aapm.cc:14:
>In file included from ./aapm.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aapm.cc:14:
>In file included from ./aapm.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from aapm.cc:14:
>In file included from ./aapm.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aapm.cc:308:13: warning: using the result of an assignment as a condition
>      without parentheses [-Wparentheses]
>        else if (i = 0)
>                 ~~^~~
>aapm.cc:308:13: note: place parentheses around the assignment to silence this
>      warning
>        else if (i = 0)
>                   ^
>                 (    )
>aapm.cc:308:13: note: use '==' to turn this assignment into an equality
>      comparison
>        else if (i = 0)
>                   ^
>                   ==
>aapm.cc:1009:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (apmFont == null) apmFont = YFont::getFont(XFA(apmFontName));
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aapm.cc:1126:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (gradient != null) {
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aapm.cc:1131:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (taskbackPixmap != null) {
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aapm.cc:1173:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (p != null) {
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aapm.cc:1233:28: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (apmFont != null ? apmFont->textWidth(s, count) : 0) + 4;
>                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>aapm.cc:1239:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (p != null)
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>16 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c atray.cc
>In file included from atray.cc:21:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atray.cc:21:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atray.cc:21:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atray.cc:21:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atray.cc:21:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atray.cc:21:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atray.cc:21:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atray.cc:21:
>In file included from ./atray.h:13:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atray.cc:21:
>In file included from ./atray.h:13:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from atray.cc:21:
>In file included from ./atray.h:14:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atray.cc:121:38: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (taskMinimizedGradient == null && taskbuttonminimizedPixbuf != null)
>                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atray.cc:121:75: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (taskMinimizedGradient == null && taskbuttonminimizedPixbuf != null)
>                                                                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atray.cc:130:35: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (taskActiveGradient == null && taskbuttonactivePixbuf != null)
>                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atray.cc:130:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (taskActiveGradient == null && taskbuttonactivePixbuf != null)
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atray.cc:139:35: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (taskNormalGradient == null && taskbuttonPixbuf != null)
>                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atray.cc:139:63: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (taskNormalGradient == null && taskbuttonPixbuf != null)
>                                                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atray.cc:154:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (bgGrad != null)
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atray.cc:158:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (bgPix != null)
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atray.cc:169:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (icon != null) {
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atray.cc:385:63: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ref<YImage> gradient(parent() ? parent()->getGradient() : null);
>                                                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atray.cc:387:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (gradient != null)
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>atray.cc:391:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (taskbackPixmap != null)
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>16 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c ysmapp.cc
>In file included from ysmapp.cc:5:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ysmapp.cc:5:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ysmapp.cc:5:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ysmapp.cc:5:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ysmapp.cc:5:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ysmapp.cc:5:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ysmapp.cc:5:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ysmapp.cc:5:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:4:
>In file included from ./yapp.h:6:
>In file included from ./ypaths.h:12:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ysmapp.cc:5:
>In file included from ./ysmapp.h:4:
>In file included from ./yxapp.h:6:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>22 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c yxtray.cc
>9 warnings generated.
>In file included from yxtray.cc:3:
>In file included from ./yxtray.h:4:
>In file included from ./yxembed.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yxtray.cc:3:
>In file included from ./yxtray.h:4:
>In file included from ./yxembed.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yxtray.cc:3:
>In file included from ./yxtray.h:4:
>In file included from ./yxembed.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yxtray.cc:3:
>In file included from ./yxtray.h:4:
>In file included from ./yxembed.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yxtray.cc:3:
>In file included from ./yxtray.h:4:
>In file included from ./yxembed.h:5:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c ymenu.cc
>In file included from yxtray.cc:3:
>In file included from ./yxtray.h:4:
>In file included from ./yxembed.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yxtray.cc:3:
>In file included from ./yxtray.h:4:
>In file included from ./yxembed.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yxtray.cc:3:
>In file included from ./yxtray.h:4:
>In file included from ./yxembed.h:5:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yxtray.cc:3:
>In file included from ./yxtray.h:4:
>In file included from ./yxembed.h:5:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yxtray.cc:8:
>In file included from ./wmtaskbar.h:8:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenu.cc:10:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenu.cc:10:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenu.cc:10:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenu.cc:10:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenu.cc:10:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenu.cc:10:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenu.cc:10:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenu.cc:10:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenu.cc:10:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenu.cc:12:
>./ymenuitem.h:25:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (fName != null && fHotCharPos >= 0) ? fName.charAt(fHotCh...
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenu.cc:12:
>./ymenuitem.h:47:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool isSeparator() { return getName() == null && getSubmenu() == 0; }
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenu.cc:19:
>./ascii.h:1:9: warning: '__ASCII_H' is used as a header guard here, followed by
>      #define of a different macro [-Wheader-guard]
>#ifndef __ASCII_H
>        ^~~~~~~~~
>./ascii.h:2:9: note: '__ASCIIH_' is defined here; did you mean '__ASCII_H'?
>#define __ASCIIH_
>        ^~~~~~~~~
>        __ASCII_H
>ymenu.cc:59:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (menuFont == null)
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:96:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fGradient = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:156:44: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (getItem(selItem)->getIcon() != null &&
>                                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:454:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (menuFont != null) { // ================ autoscrolling of lar...
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:617:48: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    return add(new YMenuItem(name, hotCharPos, null, action, submenu));
>                                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:621:48: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    return add(new YMenuItem(name, hotCharPos, null, 0, submenu));
>                                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:645:32: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (item->getName() == null || fItems[i]->getName() == null)
>                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:645:64: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (item->getName() == null || fItems[i]->getName() == null)
>                                                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:675:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (name != null)
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:678:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>            if (iname != null && iname.equals(name))
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:691:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (iLetterRef != null) {
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:824:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (menubackPixbuf != null
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:825:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        && !(fGradient != null &&
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:859:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fGradient != null)
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:863:27: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (menubackPixmap != null)
>                          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:873:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (menusepPixbuf != null) {
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:884:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (menusepPixmap != null) {
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:925:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (mitem->getName() == null && mitem->getSubmenu() == 0) {
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:943:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                    if (menuselPixbuf != null) {
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:947:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                        if (menuselPixmap != null) {
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:1018:48: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                } else if (mitem->getIcon() != null) {
>                                               ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:1028:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                if (name != null) {
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:1030:35: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                        (param != null ? paramPos - delta
>                                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenu.cc:1051:30: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>                if (param != null) {
>                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>10 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c ylabel.cc
>In file included from ylabel.cc:10:
>In file included from ./ylabel.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ylabel.cc:10:
>In file included from ./ylabel.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ylabel.cc:10:
>In file included from ./ylabel.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ylabel.cc:10:
>In file included from ./ylabel.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ylabel.cc:10:
>In file included from ./ylabel.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ylabel.cc:10:
>In file included from ./ylabel.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ylabel.cc:10:
>In file included from ./ylabel.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ylabel.cc:10:
>In file included from ./ylabel.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ylabel.cc:10:
>In file included from ./ylabel.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ylabel.cc:11:
>In file included from ./ydialog.h:4:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ylabel.cc:25:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (labelFont == null)
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ylabel.cc:40:63: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ref<YImage> gradient(parent() ? parent()->getGradient() : null);
>                                                              ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ylabel.cc:42:21: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (gradient != null)
>                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ylabel.cc:46:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (dialogbackPixmap != null)
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ylabel.cc:53:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fLabel != null) {
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ylabel.cc:57:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        ustring s(null), r(null);
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ylabel.cc:57:28: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        ustring s(null), r(null);
>                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ylabel.cc:77:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fLabel != null) {
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ylabel.cc:79:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        ustring s(null), r(null);
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ylabel.cc:79:28: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        ustring s(null), r(null);
>                           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>20 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c yscrollview.cc
>In file included from yscrollview.cc:10:
>In file included from ./yscrollview.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollview.cc:10:
>In file included from ./yscrollview.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollview.cc:10:
>In file included from ./yscrollview.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollview.cc:10:
>In file included from ./yscrollview.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollview.cc:10:
>In file included from ./yscrollview.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollview.cc:10:
>In file included from ./yscrollview.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollview.cc:10:
>In file included from ./yscrollview.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollview.cc:10:
>In file included from ./yscrollview.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollview.cc:10:
>In file included from ./yscrollview.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>9 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c ymenuitem.cc
>36 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c yscrollbar.cc
>In file included from ymenuitem.cc:8:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenuitem.cc:8:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenuitem.cc:8:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenuitem.cc:8:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenuitem.cc:8:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenuitem.cc:8:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenuitem.cc:8:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenuitem.cc:8:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollbar.cc:13:
>In file included from ./yscrollbar.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollbar.cc:13:
>In file included from ./yscrollbar.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollbar.cc:13:
>In file included from ./yscrollbar.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollbar.cc:13:
>In file included from ./yscrollbar.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollbar.cc:13:
>In file included from ./yscrollbar.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to referenceIn file included from  has
>      undefined behavior [-Wnull-dereference]
>ymenuitem.cc:9:
>./ymenuitem.h:25:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)        return (fName != null && fHotCharPos >= 0) ? fName.charAt(fHotCh...
>                         ^~~~
>
>              ^~~~~~~~~~~~~~~~~~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenuitem.cc:9:
>./ymenuitem.h:47:46: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool isSeparator() { return getName() == null && getSubmenu() == 0; }
>                                             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ymenuitem.cc:10:
>In file included from ./ymenu.h:4:
>In file included from ./ypopup.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenuitem.cc:26:56: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fHotCharPos(aHotCharPos), fSubmenu(submenu), fIcon(null),
>                                                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenuitem.cc:29:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fName != null && (fHotCharPos == -2 || fHotCharPos == -3)) {
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenuitem.cc:48:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fName == null || fHotCharPos >= fName.length() || fHotCharPos < -1)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenuitem.cc:53:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fName(name), fParam(null), fAction(NULL), fHotCharPos (-1),
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenuitem.cc:54:24: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fSubmenu(0), fIcon(null), fChecked(false), fEnabled(true) {
>                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenuitem.cc:58:11: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fName(null), fParam(null), fAction(0), fHotCharPos(-1),
>          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenuitem.cc:58:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fName(null), fParam(null), fAction(0), fHotCharPos(-1),
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenuitem.cc:59:24: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fSubmenu(0), fIcon(null), fChecked(false), fEnabled(false) {
>                       ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenuitem.cc:84:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (getName() != null || getSubmenu()) {
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenuitem.cc:126:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    return icon != null ? YIcon::menuSize(): 0;
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenuitem.cc:132:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    return name != null ? menuFont->textWidth(name) : 0;
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ymenuitem.cc:137:22: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    return  param != null ? menuFont->textWidth(param) : 0;
>                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollbar.cc:13:
>In file included from ./yscrollbar.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollbar.cc:13:
>In file included from ./yscrollbar.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollbar.cc:13:
>In file included from ./yscrollbar.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from yscrollbar.cc:13:
>In file included from ./yscrollbar.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>23 warnings generated.
>/usr/local/bin/clang++60 -fno-rtti -O2 -pipe  -fstack-protector -isystem /usr/local/include -fno-strict-aliasing  -isystem /usr/local/include -std=c++11  -DHAVE_CONFIG_H -DLIBDIR='"/usr/local/share/icewm"' -DCFGDIR='"/usr/local/share/icewm"' -DLOCDIR='"/usr/local/share/locale"' -DKDEDIR='""' -DPACKAGE='"icewm"' -DVERSION='"1.3.8"' -DHOSTOS='"FreeBSD 12.0-CURRENT"' -DHOSTCPU='"amd64"' -DEXEEXT='""' -DICEWMEXE='"icewm"' -DICEWMTRAYEXE='"icewmtray"' -DICEWMBGEXE='"icewmbg"' -DICESMEXE='"icewm-session"' -DICEHELPEXE='"icehelp"' -DICEHELPIDX='"/usr/local/share/doc/icewm/icewm.html"' `pkg-config gdk-pixbuf-xlib-2.0 --cflags` -I/usr/local/include -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -I/usr/local/include/freetype2 -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include/gdk-pixbuf-2.0 -pthread -I/usr/local/include/libpng16     -c ybutton.cc
>In file included from ybutton.cc:9:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:10:42: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(const class null_ref &): fPath(null) {}
>                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ybutton.cc:9:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:13:20: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    upath(): fPath(null) {};
>                   ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ybutton.cc:9:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:33:17: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        fPath = null;
>                ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ybutton.cc:9:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:37:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator==(const class null_ref &) const { return fPath == null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ybutton.cc:9:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>In file included from ./ypaint.h:6:
>In file included from ./ypixmap.h:6:
>./upath.h:38:69: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    bool operator!=(const class null_ref &) const { return fPath != null; }
>                                                                    ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ybutton.cc:9:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:168:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ybutton.cc:9:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:251:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ybutton.cc:9:
>In file included from ./ybutton.h:4:
>In file included from ./ywindow.h:4:
>./ypaint.h:255:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        if (p != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ybutton.cc:9:
>In file included from ./ybutton.h:4:
>./ywindow.h:136:54: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>        return (parent() ? parent()->getGradient() : null); }
>                                                     ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>In file included from ybutton.cc:18:
>./ascii.h:1:9: warning: '__ASCII_H' is used as a header guard here, followed by
>      #define of a different macro [-Wheader-guard]
>#ifndef __ASCII_H
>        ^~~~~~~~~
>./ascii.h:2:9: note: '__ASCIIH_' is defined here; did you mean '__ASCII_H'?
>#define __ASCIIH_
>        ^~~~~~~~~
>        __ASCII_H
>In file included from ybutton.cc:19:
>In file included from ./wmtaskbar.h:8:
>./wmclient.h:174:58: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    ustring windowRole() const { return fWMWindowRole != null ? fWMWindo...
>                                                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ybutton.cc:43:11: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fIcon(null),
>          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ybutton.cc:45:12: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fImage(null),
>           ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ybutton.cc:46:11: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fText(null),
>          ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ybutton.cc:55:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (normalButtonFont == null)
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ybutton.cc:57:29: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (activeButtonFont == null)
>                            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ybutton.cc:84:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fIcon != null)
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ybutton.cc:91:19: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fImage != null)
>                  ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ybutton.cc:95:23: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    else if (fText != null) {
>                      ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ybutton.cc:161:15: error: non-constant-expression cannot be narrowed from type
>      'int' to 'short' in initializer list [-Wc++11-narrowing]
>            { (int)dp, (int)dp, (int)width() - ds, 1 },
>              ^~~~~~~
>ybutton.cc:161:15: note: insert an explicit cast to silence this issue
>            { (int)dp, (int)dp, (int)width() - ds, 1 },
>              ^~~~~~~
>              static_cast<short>( )
>ybutton.cc:161:24: error: non-constant-expression cannot be narrowed from type
>      'int' to 'short' in initializer list [-Wc++11-narrowing]
>            { (int)dp, (int)dp, (int)width() - ds, 1 },
>                       ^~~~~~~
>ybutton.cc:161:24: note: insert an explicit cast to silence this issue
>            { (int)dp, (int)dp, (int)width() - ds, 1 },
>                       ^~~~~~~
>                       static_cast<short>( )
>ybutton.cc:161:33: error: non-constant-expression cannot be narrowed from type
>      'int' to 'unsigned short' in initializer list [-Wc++11-narrowing]
>            { (int)dp, (int)dp, (int)width() - ds, 1 },
>                                ^~~~~~~~~~~~~~~~~
>ybutton.cc:161:33: note: insert an explicit cast to silence this issue
>            { (int)dp, (int)dp, (int)width() - ds, 1 },
>                                ^~~~~~~~~~~~~~~~~
>                                static_cast<unsigned short>( )
>ybutton.cc:162:15: error: non-constant-expression cannot be narrowed from type
>      'int' to 'short' in initializer list [-Wc++11-narrowing]
>            { (int)dp, (int)dp + 1, 1, (int)height() - ds - 2 },
>              ^~~~~~~
>ybutton.cc:162:15: note: insert an explicit cast to silence this issue
>            { (int)dp, (int)dp + 1, 1, (int)height() - ds - 2 },
>              ^~~~~~~
>              static_cast<short>( )
>ybutton.cc:162:24: error: non-constant-expression cannot be narrowed from type
>      'int' to 'short' in initializer list [-Wc++11-narrowing]
>            { (int)dp, (int)dp + 1, 1, (int)height() - ds - 2 },
>                       ^~~~~~~~~~~
>ybutton.cc:162:24: note: insert an explicit cast to silence this issue
>            { (int)dp, (int)dp + 1, 1, (int)height() - ds - 2 },
>                       ^~~~~~~~~~~
>                       static_cast<short>( )
>ybutton.cc:162:40: error: non-constant-expression cannot be narrowed from type
>      'int' to 'unsigned short' in initializer list [-Wc++11-narrowing]
>            { (int)dp, (int)dp + 1, 1, (int)height() - ds - 2 },
>                                       ^~~~~~~~~~~~~~~~~~~~~~
>ybutton.cc:162:40: note: insert an explicit cast to silence this issue
>            { (int)dp, (int)dp + 1, 1, (int)height() - ds - 2 },
>                                       ^~~~~~~~~~~~~~~~~~~~~~
>                                       static_cast<unsigned short>( )
>ybutton.cc:163:15: error: non-constant-expression cannot be narrowed from type
>      'int' to 'short' in initializer list [-Wc++11-narrowing]
>            { (int)dp + width() - ds - 1, (int)dp + 1, 1, (int)height() ...
>              ^~~~~~~~~~~~~~~~~~~~~~~~~~
>ybutton.cc:163:15: note: insert an explicit cast to silence this issue
>            { (int)dp + width() - ds - 1, (int)dp + 1, 1, (int)height() ...
>              ^~~~~~~~~~~~~~~~~~~~~~~~~~
>              static_cast<short>(       )
>ybutton.cc:163:43: error: non-constant-expression cannot be narrowed from type
>      'int' to 'short' in initializer list [-Wc++11-narrowing]
>            { (int)dp + width() - ds - 1, (int)dp + 1, 1, (int)height() ...
>                                          ^~~~~~~~~~~
>ybutton.cc:163:43: note: insert an explicit cast to silence this issue
>            { (int)dp + width() - ds - 1, (int)dp + 1, 1, (int)height() ...
>                                          ^~~~~~~~~~~
>                                          static_cast<short>( )
>ybutton.cc:163:59: error: non-constant-expression cannot be narrowed from type
>      'int' to 'unsigned short' in initializer list [-Wc++11-narrowing]
>  ...{ (int)dp + width() - ds - 1, (int)dp + 1, 1, (int)height() - ds - 2 },
>                                                   ^~~~~~~~~~~~~~~~~~~~~~
>ybutton.cc:163:59: note: insert an explicit cast to silence this issue
>  ...+ width() - ds - 1, (int)dp + 1, 1, (int)height() - ds - 2 },
>                                         ^~~~~~~~~~~~~~~~~~~~~~
>                                         static_cast<unsigned short>( )
>ybutton.cc:164:15: error: non-constant-expression cannot be narrowed from type
>      'int' to 'short' in initializer list [-Wc++11-narrowing]
>            { (int)dp, (int)dp + height() - ds - 1, (int)width() - ds, 1 }
>              ^~~~~~~
>ybutton.cc:164:15: note: insert an explicit cast to silence this issue
>            { (int)dp, (int)dp + height() - ds - 1, (int)width() - ds, 1 }
>              ^~~~~~~
>              static_cast<short>( )
>ybutton.cc:164:24: error: non-constant-expression cannot be narrowed from type
>      'int' to 'short' in initializer list [-Wc++11-narrowing]
>            { (int)dp, (int)dp + height() - ds - 1, (int)width() - ds, 1 }
>                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>ybutton.cc:164:24: note: insert an explicit cast to silence this issue
>            { (int)dp, (int)dp + height() - ds - 1, (int)width() - ds, 1 }
>                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>                       static_cast<short>(        )
>ybutton.cc:164:53: error: non-constant-expression cannot be narrowed from type
>      'int' to 'unsigned short' in initializer list [-Wc++11-narrowing]
>            { (int)dp, (int)dp + height() - ds - 1, (int)width() - ds, 1 }
>                                                    ^~~~~~~~~~~~~~~~~
>ybutton.cc:164:53: note: insert an explicit cast to silence this issue
>  ...{ (int)dp, (int)dp + height() - ds - 1, (int)width() - ds, 1 }
>                                             ^~~~~~~~~~~~~~~~~
>                                             static_cast<unsigned short>( )
>ybutton.cc:167:20: error: expected expression
>        static_cast<int>( )
>                          ^
>ybutton.cc:333:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fIcon != null) {
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ybutton.cc:335:26: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    } else if (fImage != null) {
>                         ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ybutton.cc:338:25: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    } else if (fText != null) {
>                        ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ybutton.cc:349:14: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fImage = null;
>             ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ybutton.cc:357:13: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    fIcon = null;
>            ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>ybutton.cc:369:18: warning: binding dereferenced null pointer to reference has
>      undefined behavior [-Wnull-dereference]
>    if (fText != null) {
>                 ^~~~
>./ref.h:22:15: note: expanded from macro 'null'
>#define null (*(class null_ref *)0)
>              ^~~~~~~~~~~~~~~~~~~~
>25 warnings and 13 errors generated.
>9 warnings generated.
>gmake[2]: *** [Makefile:206: ybutton.o] Error 1
>gmake[2]: *** Waiting for unfinished jobs....
>gmake[2]: Leaving directory '/usr/ports/x11-wm/icewm/work/icewm-1.3.8/src'
>gmake[1]: *** [Makefile:51: base] Error 2
>gmake[1]: Leaving directory '/usr/ports/x11-wm/icewm/work/icewm-1.3.8'
>===> Compilation failed unexpectedly.
>Try to set MAKE_JOBS_UNSAFE=yes and rebuild before reporting the failure to
>the maintainer.
>*** Error code 1
>
>Stop.
>make: stopped in /usr/ports/x11-wm/icewm
>root@12current:/usr/ports/x11-wm/icewm # exit
>
>exit
>
>Script done on Fri May 25 19:21:31 2018

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Attachments on bug 228317: 193482 | 193483 | 193659 | 193660 | 193678 | 193703 | 194007 | 194008