--- ClanLib-0.6.3/Sources/GL/GLX/displaycard_glx.h.orig	2002-10-23 19:35:17 +0400

+++ ClanLib-0.6.3/Sources/GL/GLX/displaycard_glx.h	2002-10-23 19:35:25 +0400

@@ -20,6 +20,7 @@

 #include "Display/Display/X11/display_xwindow.h"

 #include "Display/Display/X11/x11_resolution.h"

 #include "GL/Generic/displaycard_gl_generic.h"

+#define GLX_GLXEXT_PROTOTYPES 1

 #include <GL/glx.h>

 #include <iostream>