--- a/configure.ac	Wed Oct 25 13:32:17 2006 +0000
+++ b/configure.ac	Wed Oct 25 16:49:53 2006 +0000
@@ -11,6 +11,15 @@
 AC_CONFIG_SRCDIR([config.h.in])
 
 #------------------------------------------------------------------------------
+# Global
+#------------------------------------------------------------------------------
+
+branch=trunk
+
+AC_DEFINE_UNQUOTED(BRANCH, ["$branch"], [Subversion branch])
+AC_SUBST(BRANCH, [$branch])
+
+#------------------------------------------------------------------------------
 # Linux sources
 #------------------------------------------------------------------------------