Thanks PR merged.

On 29 August 2017 at 10:39, Mathieu MARACHE <[email protected]>
wrote:

> Under macOS the glValidateProgram reports too many
> false negatives (errors) about missing buffers, etc..
>
> From the internet 
> https://stackoverflow.com/questions/15335510/opengl-glvalidateprogram-error-on-mac-os-x
>  :
> « […] The purpose of glValidateProgram is not to use it as an added "check" 
> step after linking the program, because the GL and application state is 
> hardly ready for actually using that program at this point, probably it's 
> even before we get around to initializing the default framebuffer (its 
> bitdepth, its multisample buffers, etc), and that's what the error hints at.
>
> An appropriate place to call glValidateProgram would be right before you make 
> a real render call. »
>
> I created Pull Request for removing the call to validateProgram on macOS 
> targets : https://github.com/openscenegraph/OpenSceneGraph/pull/334
>
> --
> nǝıɥʇɐƜ
>
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