Include file for function/variable attributes.

diff --git a/src/attributes.h b/src/attributes.h
new file mode 100644
--- /dev/null
+++ b/src/attributes.h
@@ -0,0 +1,27 @@
+/*
+Copyright (C) 2007 Darren Salt
+
+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; either version 2
+of the License, or (at your option) any later version.
+
+This program 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 this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#ifdef __GNUC__
+#define GCC_PRINTF(fmt,va) __attribute__((format(printf, fmt, va)))
+#define GCC_NORETURN __attribute__((noreturn))
+#else
+#define GCC_PRINTF(fmt,va)
+#define GCC_NORETURN
+#endif