[oe] Error message about multiple EGL / GLES providers

[Carlos Rafael Giani]

On 05/21/2013 05:22 PM, Burton, Ross wrote:
> On 21 May 2013 11:08, Carlos Rafael Giani <dv at pseudoterminal.org> wrote:
>> It would
>> be useful to instruct Mesa to turn off its OpenGLES and EGL support, leaving
>> Mesa only for GLX+Desktop OpenGL (software-rendered), if anybody really
>> needs it. As an alternative, as you suggest, I could simply turn off desktop
>> OpenGL, but I have the feeling that this would be better off as a user
>> decision that can be configured in the local.conf file. What do you think?
> You can change mesa's PACKAGECONFIG to not build egl and gles.
> meta-intel does something like this because the EMGD/CDT drivers are
> in the same boat.
>
> However considering our software GL support in Mesa is currently
> swrast (very very bad) and not llvmpipe (usable if you have enough
> CPU, which we generally don't) you generally don't want to actually
> have any OpenGL present at all.  Generally it's mesa-demos that pulls
> in virtual/libgl, and in master this can be disabled.  This may be
> worth a backport if someone wants to backport and test it.
>
> Ross
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Good point. It would also discourage people from using compositing 
managers which render using desktop OpenGL, then wondering why the 3D 
effects are so awfully slow. Same goes for stuff like Enlightenment 
Evas, which uses by default the desktop GL backend instead of the GLES one.