-# strnlen.m4 serial 2
-dnl Copyright (C) 2002-2003 Free Software Foundation, Inc.
-dnl This file is free software, distributed under the terms of the GNU
-dnl General Public License. As a special exception to the GNU General
-dnl Public License, this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
+# strnlen.m4 serial 13
+dnl Copyright (C) 2002-2003, 2005-2007, 2009-2013 Free Software Foundation,
+dnl 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([gl_FUNC_STRNLEN],
[
+ AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
+
dnl Persuade glibc <string.h> to declare strnlen().
- AC_REQUIRE([AC_GNU_SOURCE])
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
- AC_FUNC_STRNLEN
- if test $ac_cv_func_strnlen_working = no; then
- # This is necessary because automake-1.6.1 doens't understand
- # that the above use of AC_FUNC_STRNLEN means we may have to use
- # lib/strnlen.c.
- #AC_LIBOBJ(strnlen)
- AC_DEFINE(strnlen, rpl_strnlen,
- [Define to rpl_strnlen if the replacement function should be used.])
- gl_PREREQ_STRNLEN
+ AC_CHECK_DECLS_ONCE([strnlen])
+ if test $ac_cv_have_decl_strnlen = no; then
+ HAVE_DECL_STRNLEN=0
+ else
+ m4_pushdef([AC_LIBOBJ], [:])
+ dnl Note: AC_FUNC_STRNLEN does AC_LIBOBJ([strnlen]).
+ AC_FUNC_STRNLEN
+ m4_popdef([AC_LIBOBJ])
+ if test $ac_cv_func_strnlen_working = no; then
+ REPLACE_STRNLEN=1
+ fi
fi
])
# Prerequisites of lib/strnlen.c.
-AC_DEFUN([gl_PREREQ_STRNLEN], [
- AC_REQUIRE([AC_HEADER_STDC])
- AC_CHECK_HEADERS_ONCE(memory.h string.h)
- AC_CHECK_DECLS(memchr)
-])
-
+AC_DEFUN([gl_PREREQ_STRNLEN], [:])