x11-toolkits/qt5-gui fails to build with the error:

input/evdevmouse/qevdevmousehandler.cpp:56:10: fatal error: 'linux/kd.h' file not found
#include <linux/kd.h>

I fixed this by replacing the header with <sys/kbio.h>, I lifted this solution from graphics/svgalib, which I found after a little grepping.

Then I get this error:

clang++ -Wl,--no-undefined -Wl,-O1 -pthread -Wl,-rpath,/usr/local/lib -shared -o libqxcb.so .obj/qxcbclipboard.o  .obj/qxcbconnection.o  .obj/qxcbintegration.o  .obj/qxcbkeyboard.o  .obj/qxcbmime.o  .obj/qxcbdrag.o  .obj/qxcbscreen.o  .obj/qxcbwindow.o  .obj/qxcbbackingstore.o  .obj/qxcbwmsupport.o  .obj/main.o  .obj/qxcbnativeinterface.o  .obj/qxcbcursor.o  .obj/qxcbimage.o  .obj/qxcbxsettings.o  .obj/qxcbsystemtraytracker.o  .obj/qxcbconnection_xi2.o  .obj/qxcbsessionmanager.o  .obj/qglxintegration.o  .obj/moc_qxcbconnection.o  .obj/moc_qxcbmime.o  .obj/moc_qxcbnativeinterface.o  .obj/moc_qxcbsystemtraytracker.o  -L/usr/local/lib -lX11-xcb -lXi -lxcb-render-util -lSM -lICE -lxcb-glx -lxcb-render -ldbus-1 -lxcb -lxcb-image -lxcb-icccm -lxcb-sync -lxcb-xfixes -lxcb-shm -lxcb-randr -lxcb-shape -lxcb-keysyms -lxkbcommon -L/usr/obj/usr/ports/x11-toolkits/qt5-gui/work/qtbase-opensource-src-5.2.1/lib -lQt5PlatformSupport -lfontconfig -lfreetype -lgthread-2.0 -pthread -lglib-2.0 -lintl -lX
 render -lXext -lX11 -lm -lQt5DBus -lQt5Gui -lQt5Core -lGL 
.obj/qxcbconnection.o: In function `QXcbConnection::initializeXKB()':
qxcbconnection.cpp:(.text+0x1d3a): undefined reference to `xcb_xkb_id'
qxcbconnection.cpp:(.text+0x1d70): undefined reference to `xcb_xkb_use_extension'
qxcbconnection.cpp:(.text+0x1d7c): undefined reference to `xcb_xkb_use_extension_reply'
qxcbconnection.cpp:(.text+0x1dd2): undefined reference to `xcb_xkb_select_events_checked'
.obj/qxcbconnection.o:(.data.rel.ro+0x28): undefined reference to `xcb_xkb_id'
.obj/qxcbkeyboard.o: In function `QXcbKeyboard::updateKeymap()':
qxcbkeyboard.cpp:(.text+0x388): undefined reference to `xcb_xkb_get_state'
qxcbkeyboard.cpp:(.text+0x394): undefined reference to `xcb_xkb_get_state_reply'
.obj/qxcbkeyboard.o: In function `QXcbKeyboard::QXcbKeyboard(QXcbConnection*)':
qxcbkeyboard.cpp:(.text+0xd3b): undefined reference to `xcb_xkb_get_device_info'
qxcbkeyboard.cpp:(.text+0xd4b): undefined reference to `xcb_xkb_get_device_info_reply'
.obj/qxcbkeyboard.o: In function `QXcbKeyboard::updateVModMapping()':
qxcbkeyboard.cpp:(.text+0xde9): undefined reference to `xcb_xkb_get_names'
qxcbkeyboard.cpp:(.text+0xdf9): undefined reference to `xcb_xkb_get_names_reply'
qxcbkeyboard.cpp:(.text+0xe0d): undefined reference to `xcb_xkb_get_names_value_list'
qxcbkeyboard.cpp:(.text+0xe52): undefined reference to `xcb_xkb_get_names_value_list_unpack'
.obj/qxcbkeyboard.o: In function `QXcbKeyboard::updateVModToRModMapping()':
qxcbkeyboard.cpp:(.text+0x10e6): undefined reference to `xcb_xkb_get_map'
qxcbkeyboard.cpp:(.text+0x10f6): undefined reference to `xcb_xkb_get_map_reply'
qxcbkeyboard.cpp:(.text+0x110a): undefined reference to `xcb_xkb_get_map_map'
qxcbkeyboard.cpp:(.text+0x1168): undefined reference to `xcb_xkb_get_map_map_unpack'
clang++: error: linker command failed with exit code 1 (use -v to see invocation)


This seems to be defined in /usr/local/include/xcb/xkb.h, which is part of x11/libxcb; I have the latest version installed (1.9.3).

I fixed this by adding:
-lxcb-xkb
to /src/plugins/platforms/xcb/Makefile.xcb-plugin in the LIBS variable

After this, build & install seem to work okay.

Sorry for not providing a patch to fix this in the port. :-( I have a number of other things I *really* need to get done, and it's been ages since I did anything serious with the port system & CMake...