Index: m4/ax_avahi.m4
===================================================================
--- m4/ax_avahi.m4	(revision 4733)
+++ m4/ax_avahi.m4	(revision 4733)
@@ -0,0 +1,26 @@
+# SYNOPSIS
+#
+#   AX_AVAHI()
+#
+# DESCRIPTION
+#
+#   Test for the Avahi library
+#
+# LAST MODIFICATION
+#
+#   2009-07-03
+
+AC_DEFUN([AX_AVAHI],
+[
+  AC_CHECK_HEADERS(avahi-client/client.h,,
+    [AC_MSG_ERROR([Avahi Client Library not found. Install libavahi-client-dev])])
+    
+  AC_CHECK_HEADERS(avahi-common/timeval.h,,
+    [AC_MSG_ERROR([Avahi Common Library not found. Install libavahi-common-dev])])
+    
+  AC_CHECK_LIB([avahi-client],[avahi_entry_group_new],,
+    [AC_MSG_ERROR([Avahi Client Library not found. Install libavahi-client-dev])])
+    
+  AC_CHECK_LIB([avahi-common],[avahi_free],,
+    [AC_MSG_ERROR([Avahi Client Library not found. Install libavahi-client-dev])])
+])