[yocto] [meta-qt5][meta-raspberrypi]: QMAKE_LIBS_EGL not properly set

[GUEYTAT Julien]

I'm saying that meta-qt5 should directly GRAB the proper EGLFS settings from the virtual/libgles2 provider.
If qt and gles2 then grab necessary information. If information not present then use defaults like -lEGL in this case.

I guess it should be possible to get the information from a package config.

The BSP layer should not care about Qt.

-----Message d'origine-----
De : Khem Raj [mailto:raj.khem at gmail.com] 
Envoyé : mercredi 3 février 2016 16:02
À : GUEYTAT Julien
Cc : Yannick Kiekens; yocto at yoctoproject.org
Objet : Re: [yocto] [meta-qt5][meta-raspberrypi]: QMAKE_LIBS_EGL not properly set

On Wed, Feb 3, 2016 at 6:54 AM, GUEYTAT Julien <j.gueytat at cdssoft.studiel.fr> wrote:
> Setting properly the variable PACKAGECONFIG_GL to gles2 does NOT update properly the variable QMAKE_LIBS_EGL.
> By default QMAKE_LIBS_EGL = -lEGL
> And depending on hardware... it might be something like QMAKE_LIBS_EGL = -lEGL -lGLESv2 for instance.
> And this specific line... "-lEGL -lGLESv2" is only know in the provider of virtual/libglesv2 ... in this case meta-raspberry.
> The BSP layer could provide a package config file which will be read to set QMAKE_LIBS_EGL properly.
>
> => Which means we would need each package providing virtual/libglesv2 ... to provide also a package config file.
>

packageconfig could be used if libnames are consistent. something qtbase can be looked into.

for oe you can pass qmake variables like QMAKE_LIBS_EGL = -lEGL -lGLESv2

using EXTRA_QMAKEVARS_PRE variable.

> I hope it's clear now. Tell me if I missed something.
>
> -----Message d'origine-----
> De : Khem Raj [mailto:raj.khem at gmail.com] Envoyé : mercredi 3 février 
> 2016 15:45 À : GUEYTAT Julien Cc : Yannick Kiekens; 
> yocto at yoctoproject.org Objet : Re: [yocto] 
> [meta-qt5][meta-raspberrypi]: QMAKE_LIBS_EGL not properly set
>
> On Wed, Feb 3, 2016 at 3:46 AM, GUEYTAT Julien <j.gueytat at cdssoft.studiel.fr> wrote:
>> Hi everyone,
>>
>>
>>
>> I understand that you are all rewriting the qtbase rule to include at 
>> least the modification to the QMAKE_LIBS_EGL variable.
>>
>> The question is:
>>
>> Could we make somehow some work in meta-qt5 or meta-raspberrypi to 
>> not have to overwrite the qtbase rule.
>
>
> I dont understand. PAKCAGECONFIGS are specifically desined for this kind of scenario what problems are you seeing.
>
>>
>> For instance… meta-raspberrypi is providing a package config file for EGL.
>> May be you could have meta-qt5 read this package config.
>>
>>
>>
>> That’s the question. I’d like to know what the maintainers of those 
>> two layers think about that.
>>
>>
>>
>> Best Regards,
>>
>>
>>
>> De : Yannick Kiekens [mailto:yannickkiekens at gmail.com] Envoyé :
>> mercredi 3 février 2016 08:41 À : Khem Raj Cc : GUEYTAT Julien; 
>> yocto at yoctoproject.org Objet : Re: [yocto]
>> [meta-qt5][meta-raspberrypi]: QMAKE_LIBS_EGL not properly set
>>
>>
>>
>> Have a look at this git repo:
>> https://github.com/YannickKiekens/meta-qt5-pi
>>
>> I have build a qt5 eglfs with raspberry pi2 backend on master branch 
>> yesterday evening
>>
>>
>>
>> On Wed, Feb 3, 2016 at 7:08 AM, Khem Raj <raj.khem at gmail.com> wrote:
>>
>>
>>
>> On Feb 2, 2016, at 8:50 AM, GUEYTAT Julien 
>> <j.gueytat at cdssoft.studiel.fr>
>> wrote:
>>
>>
>>
>> Hi,
>>
>>
>>
>> It seems that there are some stiff missing between meta-qt5 or 
>> meta-raspberrypi.
>>
>> When we set the option gles… to qtbase we don’t get the 
>> QMAKE_LIBS_EGL set properly.
>>
>> We can compare a working set of variables in the qt mkspecs directory of qt.
>>
>> There is one dedicated file for the RaspberryPi2. May be one also for 
>> RaspberryPi.
>>
>> Anyway!
>>
>> How could we set those *_EGL variables properly? And… If they are 
>> properly set, will qtbase will take them into account?
>>
>>
>>
>> I will be happy to propose a patch but I need to get more precision first.
>>
>>
>>
>> Firstly show the DISTRO_FEATURES may be you are missing some 
>> important knobs for EGL
>>
>> like openGL and gles2 etc.
>>
>>
>>
>> Thanks in advance,
>>
>>
>>
>>
>>
>>
>>
>> Julien GUEYTAT
>>
>> Ingénieur Informatique
>>
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