--- gdk/Makefile.am.orig	2013-04-29 14:11:33.655006737 +0200
+++ gdk/Makefile.am	2013-04-29 14:11:51.570311265 +0200
@@ -19,7 +19,7 @@
 else
 gdkglext_def = gdkglext-gtk20.def
 endif
-gdkglext_win32_symbols = -export-symbols $(gdkglext_def)
+gdkglext_win32_symbols = -export-symbols $(srcdir)/$(gdkglext_def)
 endif
 
 if MS_LIB_AVAILABLE
--- gtk/Makefile.am.orig	2013-04-29 14:15:08.653658795 +0200
+++ gtk/Makefile.am	2013-04-29 14:15:26.148955772 +0200
@@ -11,7 +11,7 @@
 
 if OS_WIN32
 gtkglext_def = gtkglext.def
-gtkglext_win32_symbols = -export-symbols $(gtkglext_def)
+gtkglext_win32_symbols = -export-symbols $(srcdir)/$(gtkglext_def)
 endif
 
 if MS_LIB_AVAILABLE