- Mesa defines __gl_glext_h_ - Apple defines __glext_h_
@@ -1,4 +1,5 @@
-#ifndef __gl_glext_h_
+#if !defined(__glext_h_) && !defined(__gl_glext_h_)
+#define __glext_h_ 1
#define __gl_glext_h_ 1
#ifdef __cplusplus