1# mbstate_t.m4 serial 13
2dnl Copyright (C) 2000-2002, 2008-2012 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
7# From Paul Eggert.
8
9# BeOS 5 has <wchar.h> but does not define mbstate_t,
10# so you can't declare an object of that type.
11# Check for this incompatibility with Standard C.
12
13# AC_TYPE_MBSTATE_T
14# -----------------
15AC_DEFUN([AC_TYPE_MBSTATE_T],
16[
17   AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) dnl for HP-UX 11.11
18
19   AC_CACHE_CHECK([for mbstate_t], [ac_cv_type_mbstate_t],
20     [AC_COMPILE_IFELSE(
21        [AC_LANG_PROGRAM(
22           [AC_INCLUDES_DEFAULT[
23/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
24   <wchar.h>.
25   BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
26   included before <wchar.h>.  */
27#include <stddef.h>
28#include <stdio.h>
29#include <time.h>
30#include <wchar.h>]],
31           [[mbstate_t x; return sizeof x;]])],
32        [ac_cv_type_mbstate_t=yes],
33        [ac_cv_type_mbstate_t=no])])
34   if test $ac_cv_type_mbstate_t = yes; then
35     AC_DEFINE([HAVE_MBSTATE_T], [1],
36               [Define to 1 if <wchar.h> declares mbstate_t.])
37   else
38     AC_DEFINE([mbstate_t], [int],
39               [Define to a type if <wchar.h> does not define.])
40   fi
41])
42