mesa: enhanced to install mesaglut if freeglut is not enabled

x11/mesa/mesa.conf

@@ -0,0 +1,25 @@
+# --- SDE-COPYRIGHT-NOTE-BEGIN ---
+# This copyright note is auto-generated by ./scripts/Create-CopyPatch.
+#
+# Filename: package/.../mesa/mesa.conf
+# Copyright (C) 2009 The OpenSDE Project
+#
+# More information can be found in the files COPYING and README.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License. A copy of the
+# GNU General Public License can be found in the file COPYING.
+# --- SDE-COPYRIGHT-NOTE-END ---
+
+if ! pkginstalled freeglut; then
+	echo_status "Enabling MesaGLUT"
+	hook_add prepatch 5 'mesaglut_extract'
+
+	mesaglut_extract() {
+		local glutsrc="$(match_source_file -p GLUT)"
+		cd "$builddir"
+		tar -v $taropt "$glutsrc"
+		cd -
+	}
+fi

x11/mesa/mesa.desc

@@ -48,4 +48,4 @@
 [P] X -?---5---9 112.467
 
 [D] 3164704425 MesaLib-7.2.tar.bz2 http://dl.sourceforge.net/sourceforge/mesa3d/
-
+[D] 2013191752 MesaGLUT-7.2.tar.bz2 http://dl.sourceforge.net/sourceforge/mesa3d/