1 # mbstate_t.m4 serial 13
2 dnl Copyright (C) 2000-2002, 2008-2020 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
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.
15 AC_DEFUN([AC_TYPE_MBSTATE_T],
17 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) dnl for HP-UX 11.11
19 AC_CACHE_CHECK([for mbstate_t], [ac_cv_type_mbstate_t],
23 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
25 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
26 included before <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.])
38 AC_DEFINE([mbstate_t], [int],
39 [Define to a type if <wchar.h> does not define.])