Add a header for informational gcc macros

gcc.hpp

@@ -0,0 +1,27 @@
+/*
+ * This file is part of libgim.
+ *
+ * libgim 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, either version 3 of the License, or (at your option) any later
+ * version.
+ * 
+ * ligim is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with libgim.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2010 Danny Robson <danny@blubinc.net>
+ */
+
+#ifndef __UTIL_GCC_HPP
+#define __UTIL_GCC_HPP
+
+#define GCC_VERSION (__GNUC__       * 10000 + \
+                     __GNUC_MINOR__ * 100   + \
+                     __GNUC_PATCHLEVEL__)
+
+#endif