Qt on Raspberry pi3

chek

@sierdzio
Thank you so much for the reply, I think i'm also seeing the issue with qgeomap when doing 'make install' for 5.11.0. I'm trying to build qgroundcontrol for the raspberry and apparently it needs 5.11.0.
Do you know a solution for the qgeomap bug?

sierdzio

@chek said in Qt on Raspberry pi3:

@sierdzio
[...]
Do you know a solution for the qgeomap bug?

Not yet, but I will check it out.

I don't see it reported on Qt bugtracker yet.

chek

Hi, I've compiled 5.10.1 for the pi and it works, but when I try to open the qt-project qt-creator complains about my compiler: Unsuported Linux toolchain, only GCC 32- or 64-bit is supported.
I'm using "gcc-linaro-5.5.0-2017.10-x86_64_arm-linux-gnueabihf"
Do you know what this could be?

sierdzio

Have you added the linaro compiler in Qt Creator's settings?

chek

Yes,I've created a rpi kit, where I've added a gcc compiler for C and C++ which points to the linaro compiler I used when compiled the qt sources

sierdzio

Hm so it should work. Please check if the kit really points to your cross-compiled Qt. I've made a mistake of not checking that many times already :D And Qt Creator seems to auto-set the Qt version wrongly sometimes.

ronpetit

@sierdzio I successfully compile Qt 5.10.1 on my raspberry pi 3 using the device "linux-rasp-pi3-vc4-g++", however, after activating the OPENGL driver on raspi-cofnig, when running the qopenglwidget example, it shows the error "Failed to create service, already in use?", I checked on the internet and everybody suggest to disable the vc4 drivers to get rid of the error, however, if I do that the eglfs will complain that it cannot find any GBM, and indeed, I compile it to use those drivers, any idea how can I fix that?

sierdzio

Do you have X server running (Raspbian GUI) when you launch the example? If so, don't. Start the app directly from command line, without the X server. Not sure if it will help, but maybe.

I have not encountered that error myself.

ronpetit

@sierdzio I'm running it without X server, as I should

Now, I'm curious about this, what libs are you using for glesv2 and egl?, I'm using the ones in /opt/vc/lib folder, and I also cross compiled the Qt with those

sierdzio

@ronpetit said in Qt on Raspberry pi3:

@sierdzio I'm running it without X server, as I should

Now, I'm curious about this, what libs are you using for glesv2 and egl?, I'm using the ones in /opt/vc/lib folder, and I also cross compiled the Qt with those

Oh I don't remember to be honest. I think I didn't change anything from stock settings. I also didn't specify the OpenGL libs manually anywhere when building Qt or apps.