1 # mbswidth.m4 serial 17
2 dnl Copyright (C) 2000-2002, 2004, 2006-2010 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.
7 dnl autoconf tests required for use of mbswidth.c
10 AC_DEFUN([gl_MBSWIDTH],
12 AC_CHECK_HEADERS_ONCE([wchar.h])
13 AC_CHECK_FUNCS_ONCE([isascii mbsinit])
15 dnl UnixWare 7.1.1 <wchar.h> has a declaration of a function mbswidth()
16 dnl that clashes with ours.
17 AC_CACHE_CHECK([whether mbswidth is declared in <wchar.h>],
18 ac_cv_have_decl_mbswidth,
20 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
22 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
29 char *p = (char *) mbswidth;
31 ], ac_cv_have_decl_mbswidth=yes, ac_cv_have_decl_mbswidth=no)])
32 if test $ac_cv_have_decl_mbswidth = yes; then
37 AC_DEFINE_UNQUOTED([HAVE_DECL_MBSWIDTH_IN_WCHAR_H], [$ac_val],
38 [Define to 1 if you have a declaration of mbswidth() in <wchar.h>, and to 0 otherwise.])