From 8a367c7e743949e9257c0cb39bdd5c55a30c031d Mon Sep 17 00:00:00 2001
From: Michael Roitzsch <mroi@users.sourceforge.net>
Date: Mon, 12 Aug 2002 16:10:27 +0000
Subject: also check for the GL/GL.h header file before compiling OpenGL output
 otherwise it will try to compile it and fail, if just the lib is installed

CVS patchset: 2444
CVS date: 2002/08/12 16:10:27
---
 configure.in | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/configure.in b/configure.in
index d645c2a48..21f19313d 100644
--- a/configure.in
+++ b/configure.in
@@ -270,6 +270,7 @@ dnl
 dnl Check for OpenGL & [GLut | GLU]
 dnl
 AC_CHECK_LIB(GL, glBegin,
+	[AC_CHECK_HEADER(GL/GL.h,
              [ ac_have_opengl="yes"
                OPENGL_LIBS="-lGL" 
 	       AC_CHECK_LIB(glut, glutInit, dnl check for glut
@@ -287,8 +288,9 @@ AC_CHECK_LIB(GL, glBegin,
                                            [$X_LIBS $X_PRE_LIBS $OPENGL_LIBS -lGLU -lm $X_EXTRA_LIBS])], 
 	                    [$X_LIBS $X_PRE_LIBS -lglut $X_EXTRA_LIBS])
              ],
-	     [],
-             [$X_LIBS $X_PRE_LIBS -lGL $X_EXTRA_LIBS])
+	[])],
+   [],
+   [$X_LIBS $X_PRE_LIBS -lGL $X_EXTRA_LIBS])
 AC_SUBST(OPENGL_LIBS)
 AC_SUBST(GLUT_LIBS)
 AC_SUBST(GLU_LIBS)
-- 
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