3 dnl Copyright (C) 2000-2002, 2008-2024 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
10 # BeOS 5 has <wchar.h> but does not define mbstate_t,
11 # so you can't declare an object of that type.
12 # Check for this incompatibility with Standard C.
16 AC_DEFUN([AC_TYPE_MBSTATE_T],
18 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) dnl for HP-UX 11.11
20 AC_CACHE_CHECK([for mbstate_t], [ac_cv_type_mbstate_t],
25 [[mbstate_t x; return sizeof x;]])],
26 [ac_cv_type_mbstate_t=yes],
27 [ac_cv_type_mbstate_t=no])])
28 if test $ac_cv_type_mbstate_t = yes; then
29 AC_DEFINE([HAVE_MBSTATE_T], [1],
30 [Define to 1 if <wchar.h> declares mbstate_t.])
32 AC_DEFINE([mbstate_t], [int],
33 [Define to a type if <wchar.h> does not define.])