-#serial 6
+# memcmp.m4 serial 14
+dnl Copyright (C) 2002-2004, 2007-2010 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
-AC_DEFUN(jm_FUNC_MEMCMP,
-[AC_REQUIRE([AC_FUNC_MEMCMP])dnl
- if test $ac_cv_func_memcmp_working = no; then
- AC_DEFINE_UNQUOTED(memcmp, rpl_memcmp,
- [Define to rpl_memcmp if the replacement function should be used.])
- fi
+AC_DEFUN([gl_FUNC_MEMCMP],
+[
+ if test $cross_compiling != no; then
+ # AC_FUNC_MEMCMP as of 2.62 defaults to 'no' when cross compiling.
+ # We default to yes if memcmp appears to exist, which works
+ # better for MinGW.
+ AC_CACHE_CHECK([whether cross-compiling target has memcmp],
+ [ac_cv_func_memcmp_working],
+ [AC_LINK_IFELSE([
+ AC_LANG_PROGRAM([[#include <string.h>
+ ]], [[int ret = memcmp ("foo", "bar", 0);]])],
+ [ac_cv_func_memcmp_working=yes],
+ [ac_cv_func_memcmp_working=no])])
+ fi
+ AC_FUNC_MEMCMP
+ dnl Note: AC_FUNC_MEMCMP does AC_LIBOBJ([memcmp]).
+ if test $ac_cv_func_memcmp_working = no; then
+ AC_DEFINE([memcmp], [rpl_memcmp],
+ [Define to rpl_memcmp if the replacement function should be used.])
+ gl_PREREQ_MEMCMP
+ fi
])
+
+# Prerequisites of lib/memcmp.c.
+AC_DEFUN([gl_PREREQ_MEMCMP], [:])