diff -up GabeditSrc217/Makefile.gtkgl GabeditSrc217/Makefile
--- GabeditSrc217/Makefile.gtkgl	2008-06-09 18:24:52.000000000 +0200
+++ GabeditSrc217/Makefile	2008-06-13 11:30:36.000000000 +0200
@@ -36,6 +36,8 @@ ifneq ($(external_gtkglarea),1)
 GTKGL     = gtkglarea/*.o
 OBJECTS  += $(GTKGL)
 SUBDIRS  += gtkglarea
+else
+OBJECTS  += -lgtkgl-2.0
 endif
 
 ifneq ($(external_gl2ps),1)