[oe] [meta-qt5] Building and running issues on Raspberry Pi

Tue Jun 3 08:41:38 UTC 2014

Please find my comments inline

> Von: Stephen Arnold <stephen.arnold42 at gmail.com>
> An: openembedded-devel at lists.openembedded.org, 
> Datum: 30.05.2014 09:21
> Betreff: Re: [oe] Antwort: Re: Antwort: Re: [meta-qt5] Building and 
> running issues on Raspberry Pi
> Gesendet von: openembedded-devel-bounces at lists.openembedded.org
> 
> I haven't really played with this end of rpi graphics much, but here are 
a
> couple of things to check.  The vc-graphics, vg-graphics-hardfp, and
> userland packages are all involved in rpi graphics.  The first two 
conflict
> with each other, and there appears to be init scripts involved.  It 
looks
> like maybe both userland and one of the vc-graphics packages are 
required
> and some initial load/init stuff has to happen?  That's about all I got,
> please post if you get it working.  My rpi build has nice working audio 
but
> it would be cool to have full graphics support...
> 
> 

Thank you very much for your input!
Maybe yout got me going on the right path:

Going trough the meta-raspberry/recipes-bcm/vc-graphics [1]  folder I 
noticed something in line 10 in meta-raspberry/recipes-bcm/vc-graphics/
files/egl.pc [2]

"Cflags: -I${includedir}/vc -I${includedir}/interface 
-I${includedir}/interface/vcos -I${includedir}/interface/vcos/pthreads"

I always had to add "-I${includedir}/interface/vcos/pthreads" manually 
(mostly via "QT_CONFIG_FLAGS += " in  local.conf) otherwise qtbase won't 
compile, because it didn't find pthreads.

The commit message for egl.pc states
"This package adds a egl.pc file for use with libEGL (it is necessary to 
specify a custom include paths for the compiler due to brokenness in the 
firmware header files)." [3]

Maybe this is the root of my problems if qtbase and therefore my own 
programm and qtcinematicexperience aswell dont inherit this file and it's 
paths. Maybe my workaround has some nasty side effects.

Now I have to figure out how a *.pc file works with bitbake :-)

PS: I also needed to specify -device and -device-option CROSS_COMPILE= via 
QT_CONFIG_FLAGS. Maybe this should be done via meta-raspberrypi, too?

Regards,

Felix

[1] 
http://git.yoctoproject.org/cgit/cgit.cgi/meta-raspberrypi/tree/recipes-bcm/vc-graphics
[2] 
http://git.yoctoproject.org/cgit/cgit.cgi/meta-raspberrypi/tree/recipes-bcm/vc-graphics/files/egl.pc
[3] 
http://git.yoctoproject.org/cgit/cgit.cgi/meta-raspberrypi/commit/recipes-bcm/vc-graphics/files/egl.pc?id=fac94bf7de6ee76b8ef1f74bc1dba565eeaabf2a

> On Tue, May 27, 2014 at 9:31 AM, Felix01 Fischer 
<felix01.fischer at iav.de>
> wrote:
> 
> > openembedded-devel-bounces at lists.openembedded.org schrieb am 
27.05.2014
> > 14:58:27:
> >
> > > Von: Diego Sueiro <diego.sueiro at gmail.com>
> > > An: openembedded-devel at lists.openembedded.org,
> > > Kopie: openembedded-devel-bounces at lists.openembedded.org
> > > Datum: 27.05.2014 15:28
> > > Betreff: Re: [oe] Antwort: Re: [meta-qt5] Building and running
> > > issues on Raspberry Pi
> > > Gesendet von: openembedded-devel-bounces at lists.openembedded.org
> > >
> > > On Tue, May 27, 2014 at 9:54 AM, Felix01 Fischer
> > > <felix01.fischer at iav.de>wrote:
> > >
> > > > First, thank you for your quick answer!
> > > > Please find my comments inline.
> > > >
> > > >
> > > > > Von: Diego Sueiro <diego.sueiro at gmail.com>
> > > > > An: openembedded-devel at lists.openembedded.org,
> > > > > Datum: 27.05.2014 12:41
> > > > > Betreff: Re: [oe] [meta-qt5] Building and running issues on
> > Raspberry Pi
> > > > > Gesendet von: openembedded-devel-bounces at lists.openembedded.org
> > > > >
> > > > > On Tue, May 27, 2014 at 7:08 AM, Felix01 Fischer
> > > > > <felix01.fischer at iav.de>wrote:
> > > > >
> > > > > > It's not possible to have hardware-accelerated QT on the 
raspberry
> > pi
> > > > when
> > > > > > you are running an X11 environment, therefore I want to use 
eglfs
> > > > > > directly.
> > > > > >
> > > > > > The raspberry pi doesn't have a mali graphics core, AFAIK.
> > > > > >
> > > > >
> > > > > You are right. You should have to use userland package to get
> > GLESv2:
> > > > > 
http://git.yoctoproject.org/cgit.cgi/meta-raspberrypi/tree/recipes-
> > > > > graphics/userland/userland_git.bb
> > > > >
> > > >
> > > > I'm using this recipe and I think it's cooked into the image by
> > default.
> > > > Just to be sure I will do another image with userland added via
> > local.conf
> > > > I think if this would be missing I should get another error code, 
when
> > > > trying to start a Qt Programm
> > > >
> > > >
> > > > >
> > > > > >
> > > > > > Nevertheless, applying your patch gives me an error while
> > compiling.
> > > > > >
> > > > > > "
> > > > > > [...]/qeglfshooks_stub.cpp: In member function 'virtual void*
> > > > > > QEglFSHooks::createNativeWindow(QPlatformWindow*, const 
QSize&,
> > const
> > > > > > QSurfaceFormat&)':
> > > > > > [...]/qeglfshooks_stub.cpp:256:38: error: variable
> > > > > > 'QEglFSHooks::createNativeWindow(QPlatformWindow*, const 
QSize&,
> > const
> > > > > > QSurfaceFormat&)::mali_native_window native_window' has
> > initializer
> > > > but
> > > > > > incomplete type
> > > > > >      static struct mali_native_window native_window = {
> > > > > >                                       ^
> > > > > > [...]/qeglfshooks_stub.cpp:261:1: warning: control reaches end 
of
> > > > non-void
> > > > > > function [-Wreturn-type]
> > > > > >  }
> > > > > >  ^
> > > > > > make[4]: *** [.obj/qeglfshooks_stub.o] Error 1
> > > > > > "
> > > > > >
> > > > > > Any suggestions?
> > > > > >
> > > > >
> > > > > This patch just works for mali accelerated hardware.
> > > > >
> > > >
> > > > I'm just desperate to get it working, I had no hope it would ;-)
> > > >
> > >
> > > You can search for a similar struct on Rpi libGLESv2 headers.
> >
> >
> > Till now I don't have any success.
> > Reading through various forums it seems to me, that with raspbian it 
is
> > possible to get eglfs running.
> > But I haven't found any special patch or workaround they are maybe 
using.
> > Is there somehting special bitbake or poky does I'm not aware of?
> > Regards,
> > Felix
> >
> >
> >
> >
> > >
> > >
> > > Regards,
> > >
> > > --
> > > *dS
> > > Diego Sueiro
> > >
> > > Administrador do Embarcados
> > > www.embarcados.com.br<http://www.embarcados.com.br/?
> > > utm_source=assinatura_diego&utm_medium=e-
> > > mail&utm_campaign=Assinatura%20Email%20Diego>
> > >
> > > /*long live rock 'n roll*/
> > > --
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