1 # locale-zh.m4 serial 8
2 dnl Copyright (C) 2003, 2005-2011 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.
9 dnl Determine the name of a chinese locale with GB18030 encoding.
10 AC_DEFUN([gt_LOCALE_ZH_CN],
12 AC_REQUIRE([AC_CANONICAL_HOST])
13 AC_REQUIRE([AM_LANGINFO_CODESET])
14 AC_CACHE_CHECK([for a transitional chinese locale], [gt_cv_locale_zh_CN], [
15 AC_LANG_CONFTEST([AC_LANG_SOURCE([
20 #if HAVE_LANGINFO_CODESET
21 # include <langinfo.h>
30 /* Check whether the given locale name is recognized by the system. */
31 #if (defined _WIN32 || defined __WIN32__) && !defined __CYGWIN__
32 /* On native Win32, setlocale(category, "") looks at the system settings,
33 not at the environment variables. Also, when an encoding suffix such
34 as ".65001" or ".54936" is speficied, it succeeds but sets the LC_CTYPE
35 category of the locale to "C". */
36 if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
37 || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
40 if (setlocale (LC_ALL, "") == NULL) return 1;
42 /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
43 On MacOS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
44 is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
45 On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
46 succeeds but then nl_langinfo(CODESET) is "646". In this situation,
48 On MirBSD 10, when an unsupported locale is specified, setlocale()
49 succeeds but then nl_langinfo(CODESET) is "UTF-8". */
50 #if HAVE_LANGINFO_CODESET
52 const char *cs = nl_langinfo (CODESET);
53 if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
54 || strcmp (cs, "UTF-8") == 0)
59 /* On Cygwin, avoid locale names without encoding suffix, because the
60 locale_charset() function relies on the encoding suffix. Note that
61 LC_ALL is set on the command line. */
62 if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
64 /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
65 This excludes the UTF-8 encoding (except on MirBSD). */
66 t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
67 if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
68 for (p = buf; *p != '\0'; p++)
69 if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
71 /* Check whether a typical GB18030 multibyte sequence is recognized as a
72 single wide character. This excludes the GB2312 and GBK encodings. */
73 if (mblen ("\203\062\332\066", 5) != 4)
79 if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
80 # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
81 # otherwise on MacOS X 10.3.5 the LC_TIME=C from the beginning of the
82 # configure script would override the LC_ALL setting. Likewise for
83 # LC_CTYPE, which is also set at the beginning of the configure script.
84 # Test for the locale name without encoding suffix.
85 if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
86 gt_cv_locale_zh_CN=zh_CN
88 # Test for the locale name with explicit encoding suffix.
89 if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
90 gt_cv_locale_zh_CN=zh_CN.GB18030
93 gt_cv_locale_zh_CN=none
97 # If there was a link error, due to mblen(), the system is so old that
98 # it certainly doesn't have a chinese locale.
99 gt_cv_locale_zh_CN=none
103 LOCALE_ZH_CN=$gt_cv_locale_zh_CN
104 AC_SUBST([LOCALE_ZH_CN])