gtk+3: Do not try to initialize GL without libgl

Gdk initialization ends up calling epoxy GLX api, which calls exit()
if libGL.so.1 is not present. In practice this prevents all GTK+
applications from starting if GLX is not present.

If opengl and x11 distro features are set, make gtk+3 RDEPEND on libgl.
If opengl and x11 distro features are not set, use #ifdef to prevent
the GL initialization.

Remove libgl dependency from gtk3-demo: it can now run without
libgl (although trying to run the glarea demo will exit in that case).

[YOCTO #8529]

Signed-off-by: Jussi Kukkonen <jussi.kukkonen@intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>

0 files changed, 0 insertions, 0 deletions