libglu: dependency on x11

libglu: dependency on x11

[Gabriel Huau]

Hi,

I'm not sure to understand why do we have a dependency on X11 in the 
libGLU package? I might miss some pieces of information here, but IMO, 
it should only depends on opengl as the libGL.so could be generated 
without X11 or any Window system.

It actually breaks some builds where we depend on libGLU but we don't 
have X11.

Thanks,
Gabriel

Re: libglu: dependency on x11

[Burton, Ross]

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On 4 March 2017 at 22:52, Gabriel Huau <contact@huau-gabriel.fr> wrote:

> I'm not sure to understand why do we have a dependency on X11 in the
> libGLU package? I might miss some pieces of information here, but IMO, it
> should only depends on opengl as the libGL.so could be generated without
> X11 or any Window system.
>

How does one build libGL.so without X11, considering libGL is explicitly
GLX, and the X in GLX stands for X Window System?

Ross

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Re: libglu: dependency on x11

[Gabriel Huau]

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Ross,

Good point!

I thought it was possible to have an implementation of libGL.so without 
X11, for example by using Wayland or any other Window System, I didn't 
know that the libGL was tied to X11 (on Linux). Also, I didn't see any 
specific X11 code in the libGLU so I was a bit confused by the 
dependency on both OpenGL and x11.

Regards,
Gabriel

On 03/05/2017 08:58 AM, Burton, Ross wrote:
>
> On 4 March 2017 at 22:52, Gabriel Huau <contact@huau-gabriel.fr 
> <mailto:contact@huau-gabriel.fr>> wrote:
>
>     I'm not sure to understand why do we have a dependency on X11 in
>     the libGLU package? I might miss some pieces of information here,
>     but IMO, it should only depends on opengl as the libGL.so could be
>     generated without X11 or any Window system.
>
>
> How does one build libGL.so without X11, considering libGL is 
> explicitly GLX, and the X in GLX stands for X Window System?
>
> Ross


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Re: libglu: dependency on x11

[Burton, Ross]

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On 5 March 2017 at 18:35, Gabriel Huau <contact@huau-gabriel.fr> wrote:

> I thought it was possible to have an implementation of libGL.so without
> X11, for example by using Wayland or any other Window System, I didn't know
> that the libGL was tied to X11 (on Linux). Also, I didn't see any specific
> X11 code in the libGLU so I was a bit confused by the dependency on both
> OpenGL and x11.
>
> Non-X11 OpenGL implementations are generally EGL, which has an abstraction
for the display type.

I guess you can try removing the x11 dependency in GLU and see what
happens...  there may be no X specific code but X assumptions if it's using
the GLX API.

Ross

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