Greenisland doesn't compile with qt 5.6 due to linker errors

[n3rdopolis]

I am getting the following errors trying to compile greenisland against qt 5.6

[ 51%] Building CXX object tests/auto/platform/CMakeFiles/tst_logind.dir/tst_logind_automoc.cpp.o Scanning dependencies of target tst_libinput [ 52%] Building CXX object tests/manual/platform/CMakeFiles/tst_libinput.dir/tst_libinput.cpp.o [ 52%] Linking CXX shared library libGreenIslandCompositor.so [ 53%] Linking CXX executable tst_logind [ 53%] Built target tst_logind [ 53%] Building CXX object tests/manual/platform/CMakeFiles/tst_libinput.dir/tst_libinput_automoc.cpp.o CMakeFiles/GreenIslandCompositor.dir/wayland_wrapper/qwlcompositor.cpp.o: In function QtWayland::WindowSystemEventHandler::sendEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*)': qwlcompositor.cpp:(.text._ZN9QtWayland24WindowSystemEventHandler9sendEventEPN29QWindowSystemInterfacePrivate17WindowSystemEventE[_ZN9QtWayland24WindowSystemEventHandler9sendEventEPN29QWindowSystemInterfacePrivate17WindowSystemEventE]+0x8a): undefined reference toQWaylandXkb::modifiers(xkbstate)' qwlcompositor.cpp:(.text._ZN9QtWayland24WindowSystemEventHandler9sendEventEPN29QWindowSystemInterfacePrivate17WindowSystemEventE[ZN9QtWayland24WindowSystemEventHandler9sendEventEPN29QWindowSystemInterfacePrivate17WindowSystemEventE]+0x10f): undefined reference to `QWaylandXkb::keysymToQtKey(unsigned int, QFlagsQt::KeyboardModifier&, QString const&)' collect2: error: ld returned 1 exit status src/waylandcompositor/CMakeFiles/GreenIslandCompositor.dir/build.make:1989: recipe for target 'src/waylandcompositor/libGreenIslandCompositor.so.0.6.92' failed make[2]: ** [src/waylandcompositor/libGreenIslandCompositor.so.0.6.92] Error 1 CMakeFiles/Makefile2:1504: recipe for target 'src/waylandcompositor/CMakeFiles/GreenIslandCompositor.dir/all' failed make[1]: * [src/waylandcompositor/CMakeFiles/GreenIslandCompositor.dir/all] Error 2 make[1]: * Waiting for unfinished jobs.... [ 53%] Building CXX object tests/auto/platform/CMakeFiles/tst_udev.dir/tst_udev_automoc.cpp.o [ 53%] Linking CXX executable tst_libinput [ 54%] Linking CXX executable tst_udev [ 54%] Built target tst_libinput [ 54%] Built target tst_udev Makefile:160: recipe for target 'all' failed make: *\ [all] Error 2 PackageCompileSource finished in 207 seconds