1# wcwidth.m4 serial 13 2dnl Copyright (C) 2006, 2007 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7AC_DEFUN([gl_FUNC_WCWIDTH], 8[ 9 AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) 10 11 dnl Persuade glibc <wchar.h> to declare wcwidth(). 12 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) 13 14 AC_REQUIRE([gt_TYPE_WCHAR_T]) 15 AC_REQUIRE([gt_TYPE_WINT_T]) 16 17 AC_CHECK_HEADERS_ONCE([wchar.h]) 18 AC_CHECK_FUNCS_ONCE([wcwidth]) 19 20 AC_CHECK_DECLS([wcwidth], [], [], [ 21/* AIX 3.2.5 declares wcwidth in <string.h>. */ 22#include <string.h> 23/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before 24 <wchar.h>. 25 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included 26 before <wchar.h>. */ 27#include <stddef.h> 28#include <stdio.h> 29#include <time.h> 30#include <wchar.h> 31]) 32 if test $ac_cv_have_decl_wcwidth != yes; then 33 HAVE_DECL_WCWIDTH=0 34 fi 35 36 if test $ac_cv_func_wcwidth = no; then 37 REPLACE_WCWIDTH=1 38 else 39 dnl On MacOS X 10.3, wcwidth(0x0301) (COMBINING ACUTE ACCENT) returns 1. 40 dnl On OSF/1 5.1, wcwidth(0x200B) (ZERO WIDTH SPACE) returns 1. 41 dnl This leads to bugs in 'ls' (coreutils). 42 AC_CACHE_CHECK([whether wcwidth works reasonably in UTF-8 locales], 43 [gl_cv_func_wcwidth_works], 44 [ 45 AC_TRY_RUN([ 46#include <locale.h> 47/* AIX 3.2.5 declares wcwidth in <string.h>. */ 48#include <string.h> 49/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before 50 <wchar.h>. 51 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included 52 before <wchar.h>. */ 53#include <stddef.h> 54#include <stdio.h> 55#include <time.h> 56#include <wchar.h> 57#if !HAVE_DECL_WCWIDTH 58extern 59# ifdef __cplusplus 60"C" 61# endif 62int wcwidth (int); 63#endif 64int main () 65{ 66 if (setlocale (LC_ALL, "fr_FR.UTF-8") != NULL) 67 if (wcwidth (0x0301) > 0 || wcwidth (0x200B) > 0) 68 return 1; 69 return 0; 70}], [gl_cv_func_wcwidth_works=yes], [gl_cv_func_wcwidth_works=no], 71 [gl_cv_func_wcwidth_works="guessing no"]) 72 ]) 73 case "$gl_cv_func_wcwidth_works" in 74 *yes) ;; 75 *no) REPLACE_WCWIDTH=1 ;; 76 esac 77 fi 78 if test $REPLACE_WCWIDTH = 1; then 79 AC_LIBOBJ([wcwidth]) 80 fi 81 82 if test $REPLACE_WCWIDTH = 1 || test $HAVE_DECL_WCWIDTH = 0; then 83 WCHAR_H=wchar.h 84 fi 85]) 86