--- Makefile.orig	Tue Sep 19 20:49:19 2000
+++ Makefile	Tue Sep 19 20:50:18 2000
@@ -5,7 +5,7 @@
 
 CXXFILES = main.C Frame.C Rotated.C Menu.C FrameWindow.C Desktop.C Hotkeys.C
 
-LIBS = -lfltk
+LIBS = -lfltk -lGL ${PTHREAD_LIBS}
 
 MANPAGE = 1