Index: lib/autoconf/functions.m4
===================================================================
RCS file: /cvs/autoconf/lib/autoconf/functions.m4,v
retrieving revision 1.55
diff -u -r1.55 functions.m4
--- lib/autoconf/functions.m4	21 Jan 2002 13:50:39 -0000	1.55
+++ lib/autoconf/functions.m4	12 Feb 2002 03:51:25 -0000
@@ -678,8 +678,8 @@
 ])# AC_FUNC_MALLOC
 
 
-# AC_FUNC_MEMCMP
-# --------------
+# AC_FUNC_MEMCMP([ACTION-IF-YES], [ACTION-IF-NO])
+# -----------------------------------------------
 AC_DEFUN([AC_FUNC_MEMCMP],
 [AC_CACHE_CHECK([for working memcmp], ac_cv_func_memcmp_working,
 [AC_RUN_IFELSE([AC_LANG_PROGRAM([], [[
@@ -710,7 +710,11 @@
                [ac_cv_func_memcmp_working=yes],
                [ac_cv_func_memcmp_working=no],
                [ac_cv_func_memcmp_working=no])])
-test $ac_cv_func_memcmp_working = no && AC_LIBOBJ([memcmp])
+if test $ac_cv_func_memcmp_working = yes; then
+m4_ifval([$1], [$1], [:])
+else
+m4_ifval([$2], [$2], [AC_LIBOBJ([memcmp])])
+fi
 ])# AC_FUNC_MEMCMP
 
 
Index: doc/autoconf.texi
===================================================================
RCS file: /cvs/autoconf/doc/autoconf.texi,v
retrieving revision 1.585
diff -u -r1.585 autoconf.texi
--- doc/autoconf.texi	7 Feb 2002 15:49:32 -0000	1.585
+++ doc/autoconf.texi	12 Feb 2002 03:51:33 -0000
@@ -3677,7 +3677,7 @@
 pointer), define @code{HAVE_MALLOC}.
 @end defmac
 
address@hidden AC_FUNC_MEMCMP
address@hidden AC_FUNC_MEMCMP (@ovar{action-if-yes}, @ovar{action-if-no})
 @acindex FUNC_MEMCMP
 @ovindex LIBOBJS
 @c @fuindex memcmp
@@ -3685,8 +3685,11 @@
 If the @code{memcmp} function is not available, or does not work on
 8-bit data (like the one on SunOS 4.1.3), or fails when comparing 16
 bytes or more and with at least one buffer not starting on a 4-byte
-boundary (such as the one on NeXT x86 OpenStep), require an
address@hidden replacement for @samp{memcmp}.
+boundary (such as the one on NeXT x86 OpenStep), execute
address@hidden  If @var{action-if-no} is omitted or empty, the
+default action is to require an @code{AC_LIBOBJ} replacement for
address@hidden  If the @code{memcmp} function works correctly, execute
address@hidden  The default action for this is to do nothing.
 @end defmac
 
 @defmac AC_FUNC_MKTIME