diff -Nur opengl.orig/Mem.h opengl/Mem.h
--- opengl.orig/Mem.h	2008-06-03 11:28:33.000000000 +0200
+++ opengl/Mem.h	2008-06-03 11:35:17.000000000 +0200
@@ -21,6 +21,8 @@
 
 #include <assert.h>
 #include <vector>
+#include <cstring>
+#include <cstdlib>
 
 // works only when base is a power of 2
 #define ROUND_UPPOW2(val, base)	(((val)+(base-1))&~(base-1))