Created attachment 187845 [details]
editors/emacs: link-error openmp patch [1]

Greetings!

Iff compiling editors/emacs with the following options under poudriere
> ---Begin OPTIONS List---
> ===> The following configuration options are available for emacs25-25.3_1,3:
>      ACL=on: Access control list support
>      CANNA=off: Japanese input support
>      DBUS=on: D-Bus IPC system support
>      GNUTLS=on: SSL/TLS support via GnuTLS
>      LLDB=off: LLDB support for GUD
>      MODULES=on: Dynamic modules support
>      SOURCES=on: Install sources
>      X11=on: X window system support
>      XML=on: XML format or parser support
> ====> Graphics support (each implies X11)
>      CAIRO=off: Experimental Cairo library support     (implies PNG, XFT)
>      GIF=on: GIF image format support
>      JPEG=on: JPEG image format support
>      MAGICK=on: ImageMagick image processing support
>      PNG=on: PNG image format support
>      SVG=on: Scalable vector graphics support       (implies PNG)
>      TIFF=on: TIFF image format support
>      XPM=on: XPM pixmap image format support
> ====> Other X11-dependent (each implies X11)
>      GCONF=on: GConf configuration backend support
>      GSETTINGS=on: GSettings API for application settings
>      M17N=on: M17N for text-shaping                  (implies XFT)
>      OTF=on: Opentype fonts                         (implies XFT)
>      SCROLLBARS=on: Toolkit scroll-bars
>      XFT=on: Xft font library support
>      XIM=on: X Input Method
>      XWIDGETS=off: GTK widgets in Emacs buffers           (requires GTK3)
> ====> File notification support: you can only select none or one of them
>      GFILE=off: File notification via gfile
>      KQUEUE=on: File notification via kqueue
> ====> Sound (audio) support: you can only select none or one of them
>      ALSA=off: ALSA audio architecture support
>      OSS=on: Open Sound System support
> ====> X11 toolkit (each implies X11): you can only select none or one of them
>      GTK2=off: GTK+ 2 GUI toolkit support
>      GTK3=on: GTK+ 3 GUI toolkit support
>      MOTIF=off: Motif widget library support
>      XAW=off: Athena widgets
>      XAW3D=off: Athena3D widgets
> ===> Use 'make config' to modify these settings
> ---End OPTIONS List---

compilation fails on my machine with the error:
...8<---
> gmake[3]: Leaving directory '/wrkdirs/usr/ports/editors/emacs/work/emacs-25.3/admin/unidata'
> cc -Demacs  -I. -I. -I../lib -I../lib   -I/usr/local/include -I/usr/local/include/gtk-3.0 -I/usr/local/include/pango-1.0 -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include -I/usr/local/include/cairo -I/usr/local/include/pixman-1 -I/usr/local/include/freetype2 -I/usr/local/include/libdrm -I/usr/local/include/libpng16 -I/usr/local/include/harfbuzz -I/usr/local/include/gdk-pixbuf-2.0 -I/usr/local/include/gio-unix-2.0/ -I/usr/local/include/atk-1.0 -D_THREAD_SAFE -I/usr/local/include/at-spi2-atk/2.0 -I/usr/local/include/at-spi-2.0 -I/usr/local/include/dbus-1.0 -I/usr/local/lib/dbus-1.0/include -pthread  -I/usr/local/include -D_THREAD_SAFE -pthread -I/usr/local/include/freetype2    -I/usr/local/include/librsvg-2.0 -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include -I/usr/local/include/gdk-pixbuf-2.0 -I/usr/local/include/libpng16 -I/usr/local/include/cairo -I/usr/local/include/pixman-1 -I/usr/local/include/freetype2 -I/usr/local/include/libdrm -D_THREAD_SAFE -pthread  -I/usr/local/include/ImageMagick-6 -fopenmp -DMAGICKCORE_HDRI_ENABLE=1 -DMAGICKCORE_QUANTUM_DEPTH=16  -I/usr/local/include/libpng16 -I/usr/local/include/libxml2  -I/usr/local/include/dbus-1.0 -I/usr/local/lib/dbus-1.0/include  -I/usr/local/include -D_THREAD_SAFE -pthread  -I/usr/local/include -D_THREAD_SAFE -pthread  -I/usr/local/include -D_THREAD_SAFE -pthread   -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include -pthread  -I/usr/local/include/gconf/2 -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include -I/usr/local/include/orbit-2.0 -DORBIT2=1 -pthread  -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -I/usr/local/include  -I/usr/local/include/freetype2  -I/usr/local/include -I/usr/local/include/freetype2  -I/usr/local/include/freetype2 -I/usr/local/include  -I/usr/local/include  -MMD -MF deps/.d -MP -I/usr/local/include -I/usr/local/include/p11-kit-1    -Wno-switch -Wno-tautological-constant-out-of-range-compare -Wno-pointer-sign -Wno-string-plus-int -Wno-unknown-attributes  -O2 -pipe  -fstack-protector -fno-strict-aliasing  -Wl,-znocombreloc  -fstack-protector -L/usr/local/lib \
>   -o temacs  vm-limit.o dispnew.o frame.o scroll.o xdisp.o menu.o xmenu.o window.o charset.o coding.o category.o ccl.o character.o chartab.o bidi.o cm.o term.o terminal.o xfaces.o xterm.o xfns.o xselect.o xrdb.o xsmfns.o xsettings.o gtkutil.o emacsgtkfixed.o dbusbind.o emacs.o keyboard.o macros.o keymap.o sysdep.o buffer.o filelock.o insdel.o marker.o minibuf.o fileio.o dired.o cmds.o casetab.o casefiddle.o indent.o search.o regex.o undo.o alloc.o data.o doc.o editfns.o callint.o eval.o floatfns.o fns.o font.o print.o lread.o dynlib.o emacs-module.o syntax.o unexelf.o bytecode.o process.o gnutls.o callproc.o region-cache.o sound.o atimer.o doprnt.o intervals.o textprop.o composite.o xml.o kqueue.o  profiler.o decompress.o     xfont.o ftfont.o xftfont.o ftxfont.o  fontset.o fringe.o image.o xgselect.o  terminfo.o lastfile.o gmalloc.o     ../lib/libgnu.a       -ltiff -ljpeg -lpng16 -lgif -lXpm -L/usr/local/lib -lgtk-3 -lgdk-3 -lpangocairo-1.0 -lpango-1.0 -latk-1.0 -lcairo-gobject -lcairo -lpthread -lgdk_pixbuf-2.0 -lgio-2.0 -lgobject-2.0 -lglib-2.0 -lintl  -lSM -lICE -lX11 -lX11-xcb -lxcb -lXrender -L/usr/local/lib -lXft   -L/usr/local/lib -lrsvg-2 -lm -lgio-2.0 -lgdk_pixbuf-2.0 -lgobject-2.0 -lglib-2.0 -lintl -lcairo -lpthread  -L/usr/local/lib -lMagickWand-6 -lMagickCore-6       -lrt -L/usr/local/lib -ldbus-1  -lexecinfo -L/usr/local/lib -lXrandr  -L/usr/local/lib -lXinerama  -L/usr/local/lib -lXfixes  -L/usr/local/lib -lxml2    -lutil  -lncurses  -L/usr/local/lib -lgio-2.0 -lgobject-2.0 -lglib-2.0 -lintl  -L/usr/local/lib -lgconf-2 -lglib-2.0 -lintl  -L/usr/local/lib -lgobject-2.0 -lglib-2.0 -lintl   -L/usr/local/lib -lfreetype  -L/usr/local/lib -lfontconfig -lfreetype  -L/usr/local/lib -lotf -lfreetype  -L/usr/local/lib -lm17n-flt -lm17n-core  -L/usr/local/lib -lgnutls  -lpthread  -lm -lz 
> /usr/bin/ld: cannot find -lomp
> cc: error: linker command failed with exit code 1 (use -v to see invocation)
> gmake[2]: *** [Makefile:596: temacs] Error 1
--->8...

It seems to be necessary to add ‘compiler:openmp’ to the ‘USES’ variable in
the Makefile of the emacs port. I am not sure whether it is the correct
way of solving this. (see patch file)

Iff I am not mistaken, it does use gcc6 instead of clang after this change.

I think it may have to do with ImageMagick.

The ports multimedia/transcode and multimedia/libxine might suffer from the
same problem—I have not looked into the matter yet.

Regards,
 Kalten