1# mbstate_t.m4 serial 9
2dnl Copyright (C) 2000, 2001, 2002 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  [AC_CACHE_CHECK([for mbstate_t], ac_cv_type_mbstate_t,
17     [AC_COMPILE_IFELSE(
18	[AC_LANG_PROGRAM(
19	   [AC_INCLUDES_DEFAULT
20#	    include <wchar.h>],
21	   [mbstate_t x; return sizeof x;])],
22	[ac_cv_type_mbstate_t=yes],
23	[ac_cv_type_mbstate_t=no])])
24   if test $ac_cv_type_mbstate_t = yes; then
25     AC_DEFINE([HAVE_MBSTATE_T], 1,
26	       [Define to 1 if <wchar.h> declares mbstate_t.])
27   else
28     AC_DEFINE([mbstate_t], int,
29	       [Define to a type if <wchar.h> does not define.])
30   fi])
31