Index: m4/ax_avahi.m4
===================================================================
--- m4/ax_avahi.m4	(revision 4733)
+++ m4/ax_avahi.m4	(revision 4762)
@@ -5,5 +5,5 @@
 # DESCRIPTION
 #
-#   Test for the Avahi library
+#   Test for the Avahi library. The library is optional!
 #
 # LAST MODIFICATION
@@ -13,14 +13,14 @@
 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-client/client.h,
+    [AC_MSG_NOTICE([Avahi Client Library found])], )
     
-  AC_CHECK_HEADERS(avahi-common/timeval.h,,
-    [AC_MSG_ERROR([Avahi Common Library not found. Install libavahi-common-dev])])
+  AC_CHECK_HEADERS(avahi-common/timeval.h,
+    [AC_MSG_NOTICE([Avahi Common Library found])], )
     
-  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-client],[avahi_entry_group_new],
+    [AC_MSG_NOTICE([Avahi Client Library found])], )
     
-  AC_CHECK_LIB([avahi-common],[avahi_free],,
-    [AC_MSG_ERROR([Avahi Client Library not found. Install libavahi-client-dev])])
+  AC_CHECK_LIB([avahi-common],[avahi_free],
+    [AC_MSG_NOTICE([Avahi Client Library found])], )
 ])