build: Check for GLES3/gl3ext.h existence
authorJens Georg <mail@jensge.org>
Thu, 11 May 2017 08:29:58 +0000 (10:29 +0200)
committerTim-Philipp Müller <tim@centricular.com>
Sat, 9 Dec 2017 19:32:27 +0000 (19:32 +0000)
commit73af514e1a96a91c54ecfcab98a06e2fdee1c347
treec51dbee2a2e2814f465289b75488123327d17d0f
parentaef461d4a0a575a233b8186d468345bab8b9d619
build: Check for GLES3/gl3ext.h existence

Some OpenGL drivers do not ship this but use GLES2/gl2ext.h instead.
This is also in line with Khronos's recommendations

https://bugzilla.gnome.org/show_bug.cgi?id=781885
gst-libs/gst/gl/gstglapi.h