Require a specific Autoconf version, instead of a lower bound only.

diff --git a/configure.in b/configure.in
index 858a072a019a00eda88c4cd2bbcb46897402e4d4..a8529d397409b8a90d2f7346862b3accc004e0ee 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -19,7 +19,7 @@ m4_pattern_forbid(^PGAC_)dnl to catch undefined macros
 
 AC_INIT([PostgreSQL], [8.1.10], [[email protected]])
 
-AC_PREREQ(2.59)
+m4_if(m4_defn([m4_PACKAGE_VERSION]), [2.59], [], [m4_fatal([Autoconf version 2.59 is required])])
 AC_COPYRIGHT([Copyright (c) 1996-2005, PostgreSQL Global Development Group])
 AC_CONFIG_SRCDIR([src/backend/access/common/heaptuple.c])
 AC_CONFIG_AUX_DIR(config)