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$ac_exeext; then
81 # Handle native Windows specially, because there setlocale() interprets
82 # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
83 # "fr" or "fra" as "French" or "French_France.1252",
84 # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
85 # "ja" as "Japanese" or "Japanese_Japan.932",
88 # Test for the hypothetical native Win32 locale name.
89 if (LC_ALL=Chinese_China.54936 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
90 gt_cv_locale_zh_CN=Chinese_China.54936
93 gt_cv_locale_zh_CN=none
97 # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
98 # otherwise on MacOS X 10.3.5 the LC_TIME=C from the beginning of the
99 # configure script would override the LC_ALL setting. Likewise for
100 # LC_CTYPE, which is also set at the beginning of the configure script.
101 # Test for the locale name without encoding suffix.
102 if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
103 gt_cv_locale_zh_CN=zh_CN
105 # Test for the locale name with explicit encoding suffix.
106 if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
107 gt_cv_locale_zh_CN=zh_CN.GB18030
110 gt_cv_locale_zh_CN=none
116 # If there was a link error, due to mblen(), the system is so old that
117 # it certainly doesn't have a chinese locale.
118 gt_cv_locale_zh_CN=none
122 LOCALE_ZH_CN=$gt_cv_locale_zh_CN
123 AC_SUBST([LOCALE_ZH_CN])