Make AM_SILENT_RULES optional.

diff --git a/configure.ac b/configure.ac
index 6888932739acd11e0ed1d7732bd8f80bd0370531..6b0816680a3cd3259702affffdb867dce2ebfaaf 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -14,7 +14,7 @@ AC_CONFIG_MACRO_DIR([m4])
 
 # Configure automake
 AM_INIT_AUTOMAKE([foreign -Wall -Werror])
-AM_SILENT_RULES([yes])
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES(yes)])
 
 # Configure libtool
 #LT_PREREQ([2.2])