# 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.

AC_DEFUN([gl_FUNC_STRNLEN],
[
  dnl Persuade glibc <string.h> to declare strnlen().
  AC_REQUIRE([AC_GNU_SOURCE])

  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
  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)
])