1 # mbswidth.m4 serial 19
2 dnl Copyright (C) 2000-2002, 2004, 2006-2021 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],
23 [[char *p = (char *) mbswidth;
26 [ac_cv_have_decl_mbswidth=yes],
27 [ac_cv_have_decl_mbswidth=no])])
28 if test $ac_cv_have_decl_mbswidth = yes; then
33 AC_DEFINE_UNQUOTED([HAVE_DECL_MBSWIDTH_IN_WCHAR_H], [$ac_val],
34 [Define to 1 if you have a declaration of mbswidth() in <wchar.h>, and to 0 otherwise.])