From a789107860d7d70138219dc4dc679e564fcf0f92 Mon Sep 17 00:00:00 2001
From: Damien Lespiau <damien.lespiau@intel.com>
Date: Thu, 12 May 2011 11:43:27 +0100
Subject: [PATCH] build: Only allow GLX when finding the x11 pc file

You can refine earlier the ALLOW_GLX variable when enabling OpenGL builds:
No x11.pc? no GLX!
---
 configure.ac | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index 1c9178130..1fda551ce 100644
--- a/configure.ac
+++ b/configure.ac
@@ -396,7 +396,8 @@ AS_IF([test "x$enable_gl" = "xyes"],
       [
         DRIVER_COUNT=$((DRIVER_COUNT + 1))
         COGL_DRIVER=gl
-        ALLOW_GLX=yes
+
+        PKG_CHECK_EXISTS([x11], [ALLOW_GLX=yes])
 
         cogl_gl_headers="GL/gl.h"