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102 lines
2.9 KiB
Plaintext
102 lines
2.9 KiB
Plaintext
# wcwidth.m4 serial 23
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dnl Copyright (C) 2006-2013 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN([gl_FUNC_WCWIDTH],
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[
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AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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dnl Persuade glibc <wchar.h> to declare wcwidth().
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AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
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AC_REQUIRE([gt_TYPE_WCHAR_T])
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AC_REQUIRE([gt_TYPE_WINT_T])
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AC_CHECK_HEADERS_ONCE([wchar.h])
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AC_CHECK_FUNCS_ONCE([wcwidth])
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AC_CHECK_DECLS([wcwidth], [], [], [[
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/* AIX 3.2.5 declares wcwidth in <string.h>. */
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#include <string.h>
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/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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<wchar.h>.
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BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
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before <wchar.h>. */
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#include <stddef.h>
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#include <stdio.h>
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#include <time.h>
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#include <wchar.h>
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]])
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if test $ac_cv_have_decl_wcwidth != yes; then
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HAVE_DECL_WCWIDTH=0
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fi
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if test $ac_cv_func_wcwidth = yes; then
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HAVE_WCWIDTH=1
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dnl On Mac OS X 10.3, wcwidth(0x0301) (COMBINING ACUTE ACCENT) returns 1.
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dnl On OpenBSD 5.0, wcwidth(0x05B0) (HEBREW POINT SHEVA) returns 1.
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dnl On OSF/1 5.1, wcwidth(0x200B) (ZERO WIDTH SPACE) returns 1.
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dnl This leads to bugs in 'ls' (coreutils).
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AC_CACHE_CHECK([whether wcwidth works reasonably in UTF-8 locales],
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[gl_cv_func_wcwidth_works],
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[
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AC_RUN_IFELSE(
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[AC_LANG_SOURCE([[
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#include <locale.h>
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/* AIX 3.2.5 declares wcwidth in <string.h>. */
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#include <string.h>
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/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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<wchar.h>.
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BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included
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before <wchar.h>. */
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#include <stddef.h>
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#include <stdio.h>
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#include <time.h>
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#include <wchar.h>
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#if !HAVE_DECL_WCWIDTH
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extern
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# ifdef __cplusplus
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"C"
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# endif
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int wcwidth (int);
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#endif
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int main ()
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{
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int result = 0;
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if (setlocale (LC_ALL, "fr_FR.UTF-8") != NULL)
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{
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if (wcwidth (0x0301) > 0)
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result |= 1;
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if (wcwidth (0x05B0) > 0)
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result |= 2;
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if (wcwidth (0x200B) > 0)
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result |= 4;
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}
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return result;
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}]])],
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[gl_cv_func_wcwidth_works=yes],
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[gl_cv_func_wcwidth_works=no],
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[
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changequote(,)dnl
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case "$host_os" in
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# Guess yes on glibc and AIX 7 systems.
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*-gnu* | aix[7-9]*) gl_cv_func_wcwidth_works="guessing yes";;
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*) gl_cv_func_wcwidth_works="guessing no";;
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esac
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changequote([,])dnl
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])
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])
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case "$gl_cv_func_wcwidth_works" in
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*yes) ;;
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*no) REPLACE_WCWIDTH=1 ;;
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esac
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else
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HAVE_WCWIDTH=0
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fi
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dnl We don't substitute HAVE_WCWIDTH. We assume that if the system does not
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dnl have the wcwidth function, then it does not declare it.
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])
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