# HG changeset patch
# User Paul Eggert <eggert@cs.ucla.edu>
# Date 1145489178 0
# Node ID b7a8a3274b6fd4903565fde82d6d40f274bd48ef
# Parent  93b92cba9e6a6f82f08e8a28b74399de8228b8d3
Comments about autoconf-2.60.

diff --git a/m4/extensions.m4 b/m4/extensions.m4
--- a/m4/extensions.m4
+++ b/m4/extensions.m4
@@ -5,6 +5,9 @@
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
+# This file is only needed in autoconf <= 2.59.  Newer versions of autoconf
+# have a macro AC_USE_SYSTEM_EXTENSIONS with identical semantics.
+
 # gl_USE_SYSTEM_EXTENSIONS
 # ------------------------
 # Enable extensions on systems that normally disable them,