Detect broken glext.h headers.
diff --git a/configure.in b/configure.in
index e7e2952..909d15a 100644
--- a/configure.in
+++ b/configure.in
@@ -262,6 +262,16 @@
if test $ac_cv_lib_GL_glXGetProcAddressARB = "yes"
then
+ AC_CACHE_CHECK("for OpenGL extension functions prototypes", wine_cv_extension_prototypes,
+ AC_TRY_COMPILE([#include <GL/gl.h>
+ #include <GL/glext.h>],
+ [PFNGLCOLORTABLEEXTPROC test_proc;],
+ [AC_DEFINE(HAVE_GLEXT_PROTOTYPES)
+ wine_cv_extension_prototypes="yes"],
+ [wine_cv_extension_prototypes="no"]
+ )
+ )
+
AC_DEFINE(HAVE_OPENGL)
OPENGL32_DLL=opengl32
OPENGLFILES='$(OPENGLFILES)'
