Index: src/pui/puGLUT.h
===================================================================
--- src/pui/puGLUT.h.orig	2007-12-20 16:52:32.000000000 -0700
+++ src/pui/puGLUT.h	2007-12-20 16:52:43.000000000 -0700
@@ -32,6 +32,7 @@
 
 #ifdef UL_MAC_OSX
 # include <GLUT/glut.h>
+# define APIENTRY
 #else
 # ifdef FREEGLUT_IS_PRESENT /* for FreeGLUT like PLIB 1.6.1*/
 #  include <GL/freeglut.h>