-# mbswidth.m4 serial 13
-dnl Copyright (C) 2000-2002, 2004, 2006 Free Software Foundation, Inc.
+# mbswidth.m4 serial 14
+dnl Copyright (C) 2000-2002, 2004, 2006, 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_CACHE_CHECK([whether mbswidth is declared in <wchar.h>],
ac_cv_have_decl_mbswidth,
[AC_TRY_COMPILE([
-#if HAVE_WCHAR_H
-# include <wchar.h>
-#endif
+/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
+ <wchar.h>.
+ BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
+ before <wchar.h>. */
+#include <stddef.h>
+#include <stdio.h>
+#include <time.h>
+#include <wchar.h>
], [
char *p = (char *) mbswidth;
return !p;