--- configure.in.orig	2008-12-22 23:38:10.000000000 +0000
+++ configure.in	2010-06-14 11:57:29.000000000 +0000
@@ -493,3 +493,6 @@
 dnl Check for glext.h 
-AC_CHECK_HEADERS( "GL/glext.h", have_glext_h=yes, have_glext_h=no )
+dnl XXX: which requires GL/gl.h, and autoconf > 2.64 is barfing on this
+dnk XXX: use following check to cover the bases
+dnl AC_CHECK_HEADERS( "GL/glext.h", have_glext_h=yes, have_glext_h=no )
+have_glext_h=yes