[Buildroot] Failed to build libexoxy with nvidia-driver

[Yann E. MORIN <yann.morin.1998@free.fr>]

Arnout, All,

On 2017-08-28 22:57 +0200, Arnout Vandecappelle spake thusly:
> On 28-08-17 17:53, Alexandre Maumen? wrote:
> > Hi,
> > 
> > I'm trying to build libepoxy with nvidia-driver but it fails with this
> > error:
> > 
> > checking for EGL... no
> > configure: error: Package requirements (egl) were not met:
> > 
> > Package egl was not found in the pkg-config search path.
> > Perhaps you should add the directory containing `egl.pc'
> > to the PKG_CONFIG_PATH environment variable
> > Package 'egl', required by 'world', not found
> 
>  Indeed, nvidia-driver selects BR2_PACKAGE_HAS_LIBEGL but doesn't install egl.pc
> (it does install gl.pc). And there's also no glesv2.pc. J?r?me, Yann, could you
> look into it?

I see Alexandre already reported sucess and explained the hack he did.
I'll look into submiting a proper patch soonish.

>  Perhaps we should add a check in the lib*gl* virtual packages that they install
> a .pc file...

Gut feelings only, but no. It is perfectly legit to be a provider of EGL
(or whatever other GL stuff) and not provide a .pc file with that.

However, I can see the benefit for consistency. But then, it puts some
burden on the packager which upstream do not provide a .pc file, to
write their own... :-/

Regards,
Yann E. MORIN.

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