--- a/configure.ac	Wed Oct 24 18:21:52 2012 +0200
+++ b/configure.ac	Tue Nov 06 11:49:55 2012 +0100
@@ -41,6 +41,7 @@
 #------------------------------------------------------------------------------
 
 AC_PROG_CXX
+AM_PROG_AR
 AC_PROG_LIBTOOL
 AM_PROG_CC_C_O