101 lines
2.9 KiB
Text
101 lines
2.9 KiB
Text
# wcwidth.m4 serial 23
|
|
dnl Copyright (C) 2006-2013 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_DEFUN([gl_FUNC_WCWIDTH],
|
|
[
|
|
AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
|
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
|
|
|
dnl Persuade glibc <wchar.h> to declare wcwidth().
|
|
AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
|
|
|
|
AC_REQUIRE([gt_TYPE_WCHAR_T])
|
|
AC_REQUIRE([gt_TYPE_WINT_T])
|
|
|
|
AC_CHECK_HEADERS_ONCE([wchar.h])
|
|
AC_CHECK_FUNCS_ONCE([wcwidth])
|
|
|
|
AC_CHECK_DECLS([wcwidth], [], [], [[
|
|
/* AIX 3.2.5 declares wcwidth in <string.h>. */
|
|
#include <string.h>
|
|
/* 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>
|
|
]])
|
|
if test $ac_cv_have_decl_wcwidth != yes; then
|
|
HAVE_DECL_WCWIDTH=0
|
|
fi
|
|
|
|
if test $ac_cv_func_wcwidth = yes; then
|
|
HAVE_WCWIDTH=1
|
|
dnl On Mac OS X 10.3, wcwidth(0x0301) (COMBINING ACUTE ACCENT) returns 1.
|
|
dnl On OpenBSD 5.0, wcwidth(0x05B0) (HEBREW POINT SHEVA) returns 1.
|
|
dnl On OSF/1 5.1, wcwidth(0x200B) (ZERO WIDTH SPACE) returns 1.
|
|
dnl This leads to bugs in 'ls' (coreutils).
|
|
AC_CACHE_CHECK([whether wcwidth works reasonably in UTF-8 locales],
|
|
[gl_cv_func_wcwidth_works],
|
|
[
|
|
AC_RUN_IFELSE(
|
|
[AC_LANG_SOURCE([[
|
|
#include <locale.h>
|
|
/* AIX 3.2.5 declares wcwidth in <string.h>. */
|
|
#include <string.h>
|
|
/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
|
|
<wchar.h>.
|
|
BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
|
|
before <wchar.h>. */
|
|
#include <stddef.h>
|
|
#include <stdio.h>
|
|
#include <time.h>
|
|
#include <wchar.h>
|
|
#if !HAVE_DECL_WCWIDTH
|
|
extern
|
|
# ifdef __cplusplus
|
|
"C"
|
|
# endif
|
|
int wcwidth (int);
|
|
#endif
|
|
int main ()
|
|
{
|
|
int result = 0;
|
|
if (setlocale (LC_ALL, "fr_FR.UTF-8") != NULL)
|
|
{
|
|
if (wcwidth (0x0301) > 0)
|
|
result |= 1;
|
|
if (wcwidth (0x05B0) > 0)
|
|
result |= 2;
|
|
if (wcwidth (0x200B) > 0)
|
|
result |= 4;
|
|
}
|
|
return result;
|
|
}]])],
|
|
[gl_cv_func_wcwidth_works=yes],
|
|
[gl_cv_func_wcwidth_works=no],
|
|
[
|
|
changequote(,)dnl
|
|
case "$host_os" in
|
|
# Guess yes on glibc and AIX 7 systems.
|
|
*-gnu* | aix[7-9]*) gl_cv_func_wcwidth_works="guessing yes";;
|
|
*) gl_cv_func_wcwidth_works="guessing no";;
|
|
esac
|
|
changequote([,])dnl
|
|
])
|
|
])
|
|
case "$gl_cv_func_wcwidth_works" in
|
|
*yes) ;;
|
|
*no) REPLACE_WCWIDTH=1 ;;
|
|
esac
|
|
else
|
|
HAVE_WCWIDTH=0
|
|
fi
|
|
dnl We don't substitute HAVE_WCWIDTH. We assume that if the system does not
|
|
dnl have the wcwidth function, then it does not declare it.
|
|
])
|