[Development] Bit of help for QtWayland on a Raspberry Pi

[Massimo Callegari]

Hey devs, I am trying to run the QtWayland qwindow-compositor example on a Raspberry Pi.

I have a Debian Wheezy development environment and I cross compile Qt 5.5.1 on my PC.
Turns out that I can't compile QtWayland examples cause the compositor module is not built.

According to the README, the following packages are needed:

xkbcommon 0.2.0 - http://xkbcommon.org/
wayland 1.2.0 - http://wayland.freedesktop.org/

And this is what I have in my environment:

pi at raspberrypi ~ $ dpkg -l | grep xkb
ii  libxkbcommon-dev                      0.3.1-1rpi5                             armhf        library interface to the XKB compiler - development files
ii  libxkbcommon0:armhf                   0.3.1-1rpi5                             armhf        library interface to the XKB compiler - shared library
ii  libxkbfile1:armhf                     1:1.0.8-1                               armhf        X11 keyboard file manipulation library
ii  x11-xkb-utils                         7.7~1                                   armhf        X11 XKB utilities
ii  xkb-data                              2.5.1-3                                 all          X Keyboard Extension (XKB) configuration data

pi at raspberrypi ~ $ dpkg -l | grep wayland
ii  libgail-3-0:armhf                     3.10.2-1+rpi9+waylandrpi1               armhf        GNOME Accessibility Implementation Library -- shared libraries
ii  libgtk-3-0:armhf                      3.10.2-1+rpi9+waylandrpi1               armhf        GTK+ graphical user interface library
ii  libgtk-3-bin                          3.10.2-1+rpi9+waylandrpi1               armhf        programs for the GTK+ graphical user interface library
ii  libgtk-3-common                       3.10.2-1+rpi9+waylandrpi1               all          common files for the GTK+ graphical user interface library
ii  libwayland-client0:armhf              1.4.0+git-0rpi1rpi6                     armhf        wayland compositor infrastructure - client library
ii  libwayland-cursor0:armhf              1.4.0+git-0rpi1rpi6                     armhf        wayland compositor infrastructure - cursor library
ii  libwayland-dev                        1.4.0+git-0rpi1rpi6                     armhf        wayland compositor infrastructure - development files
ii  libwayland-server0a:armhf             1.4.0+git-0rpi1rpi6                     armhf        wayland compositor infrastructure - server library
rc  libwayland0:armhf                     1.1.0-0rpi1                             armhf        wayland compositor infrastructure - shared libraries

Apparently, the problem is in the detection of xkbcommon, cause the configure summary says this:

xkbcommon-x11........... no
xkbcommon-evdev......... no


I've had a look at how the detection is performed and it's basically:
pkg-config --exists xkbcommon

If I run it on my PC it returns 1, while on the Raspberry Pi it returns 0.

I suspect I'm missing a package but I can't figure out which one.

Any help is appreciated.

Thanks,
Massimo