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1# locale-zh.m4 serial 5
2dnl Copyright (C) 2003, 2005-2009 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
7dnl From Bruno Haible.
8
9dnl Determine the name of a chinese locale with GB18030 encoding.
10AC_DEFUN([gt_LOCALE_ZH_CN],
11[
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 macosx=
16changequote(,)dnl
17 case "$host_os" in
18 darwin[56]*) ;;
19 darwin*) macosx=yes;;
20 esac
21changequote([,])dnl
22 if test -n "$macosx"; then
23 # On Darwin 7 (MacOS X), the libc supports some locales in non-UTF-8
24 # encodings, but the kernel does not support them. The documentation
25 # says:
26 # "... all code that calls BSD system routines should ensure
27 # that the const *char parameters of these routines are in UTF-8
28 # encoding. All BSD system functions expect their string
29 # parameters to be in UTF-8 encoding and nothing else."
30 # See the comments in config.charset. Therefore we bypass the test.
31 gt_cv_locale_zh_CN=none
32 else
33 AC_LANG_CONFTEST([AC_LANG_SOURCE([
34changequote(,)dnl
35#include <locale.h>
36#include <stdlib.h>
37#include <time.h>
38#if HAVE_LANGINFO_CODESET
39# include <langinfo.h>
40#endif
41#include <stdlib.h>
42#include <string.h>
43struct tm t;
44char buf[16];
45int main ()
46{
47 const char *p;
48 /* Check whether the given locale name is recognized by the system. */
49 if (setlocale (LC_ALL, "") == NULL) return 1;
50 /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
51 On MacOS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
52 is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
53 On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
54 succeeds but then nl_langinfo(CODESET) is "646". In this situation,
55 some unit tests fail. */
56#if HAVE_LANGINFO_CODESET
57 {
58 const char *cs = nl_langinfo (CODESET);
59 if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
60 return 1;
61 }
62#endif
63#ifdef __CYGWIN__
64 /* On Cygwin, avoid locale names without encoding suffix, because the
65 locale_charset() function relies on the encoding suffix. Note that
66 LC_ALL is set on the command line. */
67 if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
68#endif
69 /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
70 This excludes the UTF-8 encoding. */
71 t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
72 if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
73 for (p = buf; *p != '\0'; p++)
74 if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
75 return 1;
76 /* Check whether a typical GB18030 multibyte sequence is recognized as a
77 single wide character. This excludes the GB2312 and GBK encodings. */
78 if (mblen ("\203\062\332\066", 5) != 4)
79 return 1;
80 return 0;
81}
82changequote([,])dnl
83 ])])
84 if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
85 # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
86 # otherwise on MacOS X 10.3.5 the LC_TIME=C from the beginning of the
87 # configure script would override the LC_ALL setting. Likewise for
88 # LC_CTYPE, which is also set at the beginning of the configure script.
89 # Test for the locale name without encoding suffix.
90 if (LC_ALL=zh_CN LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
91 gt_cv_locale_zh_CN=zh_CN
92 else
93 # Test for the locale name with explicit encoding suffix.
94 if (LC_ALL=zh_CN.GB18030 LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
95 gt_cv_locale_zh_CN=zh_CN.GB18030
96 else
97 # None found.
98 gt_cv_locale_zh_CN=none
99 fi
100 fi
101 else
102 # If there was a link error, due to mblen(), the system is so old that
103 # it certainly doesn't have a chinese locale.
104 gt_cv_locale_zh_CN=none
105 fi
106 rm -fr conftest*
107 fi
108 ])
109 LOCALE_ZH_CN=$gt_cv_locale_zh_CN
110 AC_SUBST([LOCALE_ZH_CN])
111])