1# mbstate_t.m4 serial 12
2dnl Copyright (C) 2000-2002, 2008, 2009 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#	    include <wchar.h>]],
24	   [[mbstate_t x; return sizeof x;]])],
25	[ac_cv_type_mbstate_t=yes],
26	[ac_cv_type_mbstate_t=no])])
27   if test $ac_cv_type_mbstate_t = yes; then
28     AC_DEFINE([HAVE_MBSTATE_T], [1],
29	       [Define to 1 if <wchar.h> declares mbstate_t.])
30   else
31     AC_DEFINE([mbstate_t], [int],
32	       [Define to a type if <wchar.h> does not define.])
33   fi
34])
35