Use Automake 1.11, if available, for silent rules

Automake 1.11 adds support for silent rules, which are conditionally
enabled in configure.in if available.

Also, previously it was impossible to override the version chosen by
this script; this patch makes that possible.

diff --git a/autogen.sh b/autogen.sh
index bf53b27..7c2ae06 100755 (executable)
--- a/autogen.sh
+++ b/autogen.sh
@@ -27,8 +27,12 @@ fi
        DIE=1
 }
 
-AUTOMAKE=automake-1.9
-ACLOCAL=aclocal-1.9
+# If the user hasn't explicitly chosen an Automake version, use 1.11. This is
+# the earliest version that gives us silent rules.
+if test -z "$AUTOMAKE"; then
+    AUTOMAKE=automake-1.11
+    ACLOCAL=aclocal-1.11
+fi
 
 ($AUTOMAKE --version) < /dev/null > /dev/null 2>&1 || {
         AUTOMAKE=automake