From d3fcbb16789c6f975ba6e22d8a2ba477519f51bc Mon Sep 17 00:00:00 2001
From: Michael Walle <michael@walle.cc>
Date: Wed, 6 Mar 2013 20:16:58 +0100
Subject: [PATCH] configure: proper OpenGL/GLX probe

Probe for GL and GLX symbols and X11 library. This fixes a build error
where the header files are available but the libraries are not.

Signed-off-by: Michael Walle <michael@walle.cc>
---
 configure | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index 46a75947cd..d44d6b887f 100755
--- a/configure
+++ b/configure
@@ -2442,9 +2442,9 @@ if test "$opengl" != "no" ; then
 #include <X11/Xlib.h>
 #include <GL/gl.h>
 #include <GL/glx.h>
-int main(void) { return GL_VERSION != 0; }
+int main(void) { glBegin(0); glXQueryVersion(0,0,0); return 0; }
 EOF
-  if compile_prog "" "-lGL" ; then
+  if compile_prog "" "-lGL -lX11" ; then
     opengl=yes
   else
     if test "$opengl" = "yes" ; then