[Bf-committers] with_system_glew / gles options on linux.

Brecht Van Lommel brechtvanlommel at pandora.be
Fri Sep 1 20:38:13 CEST 2017

I also ran into this issue building Blender 2.8 on Ubuntu 16.04. Defaulting
to ON seems indeed better to me, Linux distribution packages that want it
OFF can still do that.

On Thu, Aug 31, 2017 at 3:19 PM, Ray Molenkamp <ray at lazydodo.com> wrote:

> Not my regular platform, but I tend to help out the odd user with linux
> building errors, and this
> one comes up rather frequently
> In our cmakelist.txt we have an exception for linux that sets
> option(WITH_SYSTEM_GLEW "Use GLEW OpenGL wrapper library provided by the
> operating system" ON)
> option(WITH_SYSTEM_GLES "Use OpenGL ES library provided by the operating
> system"           ON)
> compared to all other platforms where it is off.
> I couldn't find a justification for it, but why are these options (unlike
> all other
> WITH_SYSTEM_* options even on linux ) ON by default? Especially glew seems
> to be
> problematic, even more so for blender 2.8 where we can't figure out if
> it's glew 1 or 2
> at compile time so there's a runtime check in the final binary that'll
> prevent code
> compiled against 1.x from running.
> We ship with a known good copy in our source tree, why not use it by
> default?
> --Ray
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