$OpenBSD: patch-gtkglext_gtkmm_gl_widget_cc,v 1.1.1.1 2012/05/28 09:13:23 bentley Exp $
avoid "error: 'GdkSpanFunc' has not been declared" by including
gtk/gtkglwidget.h before widget.h.
--- gtkglext/gtkmm/gl/widget.cc.orig	Sun May 13 23:49:14 2012
+++ gtkglext/gtkmm/gl/widget.cc	Sun May 13 23:49:20 2012
@@ -17,9 +17,9 @@
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA.
  */
 
-#include <gtk/gtkglwidget.h>
-
 #include "widget.h"
+
+#include <gtk/gtkglwidget.h>
 
 namespace Gtk
 {