# mbstate_t.m4 serial 9 (fileutils-4.1.3) dnl Copyright (C) 2000-2002 Free Software Foundation, Inc. dnl This file is free software, distributed under the terms of the GNU dnl General Public License. As a special exception to the GNU General dnl Public License, this file may be distributed as part of a program dnl that contains a configuration script generated by Autoconf, under dnl the same distribution terms as the rest of that program. # From Paul Eggert. # BeOS 5 has <wchar.h> but does not define mbstate_t, # so you can't declare an object of that type. # Check for this incompatibility with Standard C. # Include stdlib.h first, because otherwise this test would fail on Linux # (at least glibc-2.1.3) because the "_XOPEN_SOURCE 500" definition elicits # a syntax error in wchar.h due to the use of undefined __int32_t. AC_DEFUN([AC_MBSTATE_T], [ AC_CHECK_HEADERS(stdlib.h) AC_CACHE_CHECK([for mbstate_t], ac_cv_type_mbstate_t, [AC_TRY_COMPILE([ #if HAVE_STDLIB_H # include <stdlib.h> #endif #include <wchar.h>], [mbstate_t x; return sizeof x;], ac_cv_type_mbstate_t=yes, ac_cv_type_mbstate_t=no)]) if test $ac_cv_type_mbstate_t = yes; then AC_DEFINE(HAVE_MBSTATE_T, 1,ma [Define to 1 if <wchar.h> declares mbstate_t.]) else AC_DEFINE(mbstate_t, int, [Define to a type if <wchar.h> does not define.]) fi])