1# mbrtowc.m4 serial 8
2dnl Copyright (C) 2001-2002, 2004-2005 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved.
6
7dnl From Paul Eggert
8
9dnl This file can be removed, and gl_FUNC_MBRTOWC replaced with
10dnl AC_FUNC_MBRTOWC, when autoconf 2.60 can be assumed everywhere.
11
12AC_DEFUN([gl_FUNC_MBRTOWC],
13[
14  dnl Same as AC_FUNC_MBRTOWC in autoconf-2.60.
15  AC_CACHE_CHECK([whether mbrtowc and mbstate_t are properly declared],
16    gl_cv_func_mbrtowc,
17    [AC_LINK_IFELSE(
18       [AC_LANG_PROGRAM(
19            [[#include <wchar.h>]],
20            [[wchar_t wc;
21              char const s[] = "";
22              size_t n = 1;
23              mbstate_t state;
24              return ! (sizeof state && (mbrtowc) (&wc, s, n, &state));]])],
25       gl_cv_func_mbrtowc=yes,
26       gl_cv_func_mbrtowc=no)])
27  if test $gl_cv_func_mbrtowc = yes; then
28    AC_DEFINE([HAVE_MBRTOWC], 1,
29      [Define to 1 if mbrtowc and mbstate_t are properly declared.])
30  fi
31])
32