From: Carl Worth <cworth@cworth.org>
Date: Mon, 29 Apr 2013 21:54:52 +0000 (-0700)
Subject: configure: Add checks for GL/gl.h
X-Git-Url: https://git.cworth.org/git?a=commitdiff_plain;h=385fae6dca60b9b41e91c9b8bfe1a05a4eb18240;hp=385fae6dca60b9b41e91c9b8bfe1a05a4eb18240;p=fips

configure: Add checks for GL/gl.h

Previously, the compile would just forge ahead assuming GL/gl.h was present.

Now, at configure time, actually look for gl.h, (first, by looking for
a pkg-config "gl" package, otherwise, trying to just test-compile
something with a #include <GL/gl.h>).

If things aren't found at configure time, tell the user which packages
to install.
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