Bug#847366: gtk apps die with 'Couldn't open libGL.so.1'

Fri Dec 9 16:17:47 UTC 2016

Looks like this behaviour was introduced with a change to cairo
in version 1.12.16-4 [1]. So looks like gtk was depending on being
linked to libGL.so indirectly via cairo.

So, any of the below should fix it:
1) Re-enable GL/EGL support in cairo.
2) Add libgl1-mesa-glx as a dependency of gtk.
3) [upstream] Introduce runtime checks before calling GL functions.

[1] https://anonscm.debian.org/cgit/collab-maint/cairo.git/commit/?id=a4bad9f8463d3e1ed2ebe15890c5c52c1c29a271