Building Qt5 for i.MX6 tx6dl

[Matthew Cattell <matthew@thorio.net>]

Hello,

I started using yocto quite recently and successfully built Qt5 for the 
raspberry pi.

  In the last week I've been trying to get the same process to work to 
build the eglfs backend for Qt5 for the karo TRITON-TX6DL. In all 
attempts, the X server or the egl backend have failed to start when 
invoking a Qt application such as qmlscene. Running eglfs results in a 
segfault and attempting to open any of the applications in the X11 
backend build of the Qt5 based demo results in a GL error with no useful 
debug output, even after setting the debug environment variable for Qt.

I have tried following the steps here: 
http://wiki.wandboard.org/index.php/Building_Qt5_using_yocto_on_Wandboard

and this gets me the closest to a working environment for the board - it 
just means the eglfs graphics won't work for graphical apps. The rest of 
Qt seems to be fine.

Also, the recent master build of yocto doesn't work at all since the 
patched ka-ro kernel that I've been using is 3.16 and this is not 
compatible with gcc5. What am I to do since I don't know which commits 
to cherry pick in order to get the recent changes that might fix the 
problem.

Searching for other similar problems potentially experienced by other 
users resulted in this:

http://stackoverflow.com/questions/20020898/qt-on-i-mx6-with-platform-eglfs-segmentation-fault

This appears to be related to the binaries required by the galcore 
kernel driver.

Does anyone have any ideas?

Thankyou