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      1 # mbswidth.m4 serial 13
      2 dnl Copyright (C) 2000-2002, 2004, 2006 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.
      6 
      7 dnl autoconf tests required for use of mbswidth.c
      8 dnl From Bruno Haible.
      9 
     10 AC_DEFUN([gl_MBSWIDTH],
     11 [
     12   AC_CHECK_HEADERS_ONCE([wchar.h wctype.h])
     13   AC_CHECK_FUNCS_ONCE([isascii mbsinit])
     14   AC_CHECK_FUNCS([iswcntrl])
     15   gl_FUNC_MBRTOWC
     16 
     17   dnl UnixWare 7.1.1 <wchar.h> has a declaration of a function mbswidth()
     18   dnl that clashes with ours.
     19   AC_CACHE_CHECK([whether mbswidth is declared in <wchar.h>],
     20     ac_cv_have_decl_mbswidth,
     21     [AC_TRY_COMPILE([
     22 #if HAVE_WCHAR_H
     23 # include <wchar.h>
     24 #endif
     25 ], [
     26   char *p = (char *) mbswidth;
     27   return !p;
     28 ], ac_cv_have_decl_mbswidth=yes, ac_cv_have_decl_mbswidth=no)])
     29   if test $ac_cv_have_decl_mbswidth = yes; then
     30     ac_val=1
     31   else
     32     ac_val=0
     33   fi
     34   AC_DEFINE_UNQUOTED(HAVE_DECL_MBSWIDTH_IN_WCHAR_H, $ac_val,
     35     [Define to 1 if you have a declaration of mbswidth() in <wchar.h>, and to 0 otherwise.])
     36 
     37   AC_TYPE_MBSTATE_T
     38 ])
     39