m4/mbstate_t.m4

   1 # mbstate_t.m4 serial 9
   2 dnl Copyright (C) 2000, 2001, 2002 Free Software Foundation, Inc.
   3 dnl This file is free software, distributed under the terms of the GNU
   4 dnl General Public License.  As a special exception to the GNU General
   5 dnl Public License, this file may be distributed as part of a program
   6 dnl that contains a configuration script generated by Autoconf, under
   7 dnl the same distribution terms as the rest of that program.
   8
   9 # From Paul Eggert.
  10
  11 # BeOS 5 has <wchar.h> but does not define mbstate_t,
  12 # so you can't declare an object of that type.
  13 # Check for this incompatibility with Standard C.
  14
  15 # AC_TYPE_MBSTATE_T
  16 # -----------------
  17 AC_DEFUN([AC_TYPE_MBSTATE_T],
  18   [AC_CACHE_CHECK([for mbstate_t], ac_cv_type_mbstate_t,
  19      [AC_COMPILE_IFELSE(
  20         [AC_LANG_PROGRAM(
  21            [AC_INCLUDES_DEFAULT
  22 #           include <wchar.h>],
  23            [mbstate_t x; return sizeof x;])],
  24         [ac_cv_type_mbstate_t=yes],
  25         [ac_cv_type_mbstate_t=no])])
  26    if test $ac_cv_type_mbstate_t = yes; then
  27      AC_DEFINE([HAVE_MBSTATE_T], 1,
  28                [Define to 1 if <wchar.h> declares mbstate_t.])
  29    else
  30      AC_DEFINE([mbstate_t], int,
  31                [Define to a type if <wchar.h> does not define.])
  32    fi])