Give a better warning for bad automake versions.

If you tried to build with automake-1.6 or earlier, we would
previously spit out pages and pages of garbage output.  Now, automake
should just say "Hey, I'm not new enough for this."

diff --git a/Makefile.am b/Makefile.am
index c2732d0aff2476a158511b35d42afbbf9b6f66f6..b9791304e4a58d799df1554866b8f41c9752521a 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,7 @@
-AUTOMAKE_OPTIONS = foreign
+# 'foreign' means that we're not enforcing GNU package rules strictly.
+# '1.7' means that we need automake 1.7 or later (and we do).
+AUTOMAKE_OPTIONS = foreign 1.7
+
 ACLOCAL_AMFLAGS = -I m4
 
 # This is the version info for the libevent binary API.  It has three