Only require libdrm if direct rendering is actually enabled.

Fix build when configured --with-driver=dri --disable-driglx-direct on targets
without drm e.g. GNU/Hurd and Cygwin

Based on the Debian patch file '05_hurd-ftbfs.diff' by Samuel Thibault.

Signed-off-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Reviewed-by: Julien Cristau <jcristau@debian.org>
Reviewed-By: Jakob Bornecrantz <wallbraker@gmail.com>
1 file changed