1# locale-ja.m4 serial 14
2dnl Copyright (C) 2003, 2005-2020 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 japanese locale with EUC-JP encoding.
10AC_DEFUN([gt_LOCALE_JA],
11[
12  AC_REQUIRE([AC_CANONICAL_HOST])
13  AC_REQUIRE([AM_LANGINFO_CODESET])
14  AC_CACHE_CHECK([for a traditional japanese locale], [gt_cv_locale_ja], [
15    AC_LANG_CONFTEST([AC_LANG_SOURCE([
16changequote(,)dnl
17#include <locale.h>
18#include <time.h>
19#if HAVE_LANGINFO_CODESET
20# include <langinfo.h>
21#endif
22#include <stdlib.h>
23#include <string.h>
24struct tm t;
25char buf[16];
26int main ()
27{
28  /* On BeOS and Haiku, locales are not implemented in libc.  Rather, libintl
29     imitates locale dependent behaviour by looking at the environment
30     variables, and all locales use the UTF-8 encoding.  */
31#if defined __BEOS__ || defined __HAIKU__
32  return 1;
33#else
34  /* Check whether the given locale name is recognized by the system.  */
35# if defined _WIN32 && !defined __CYGWIN__
36  /* On native Windows, setlocale(category, "") looks at the system settings,
37     not at the environment variables.  Also, when an encoding suffix such
38     as ".65001" or ".54936" is specified, it succeeds but sets the LC_CTYPE
39     category of the locale to "C".  */
40  if (setlocale (LC_ALL, getenv ("LC_ALL")) == NULL
41      || strcmp (setlocale (LC_CTYPE, NULL), "C") == 0)
42    return 1;
43# else
44  if (setlocale (LC_ALL, "") == NULL) return 1;
45# endif
46  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
47     On Mac OS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
48     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
49     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
50     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
51     some unit tests fail.
52     On MirBSD 10, when an unsupported locale is specified, setlocale()
53     succeeds but then nl_langinfo(CODESET) is "UTF-8".  */
54# if HAVE_LANGINFO_CODESET
55  {
56    const char *cs = nl_langinfo (CODESET);
57    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0
58        || strcmp (cs, "UTF-8") == 0)
59      return 1;
60  }
61# endif
62# ifdef __CYGWIN__
63  /* On Cygwin, avoid locale names without encoding suffix, because the
64     locale_charset() function relies on the encoding suffix.  Note that
65     LC_ALL is set on the command line.  */
66  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
67# endif
68  /* Check whether MB_CUR_MAX is > 1.  This excludes the dysfunctional locales
69     on Cygwin 1.5.x.  */
70  if (MB_CUR_MAX == 1)
71    return 1;
72  /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
73     This excludes the UTF-8 encoding (except on MirBSD).  */
74  {
75    const char *p;
76    t.tm_year = 1975 - 1900; t.tm_mon = 2 - 1; t.tm_mday = 4;
77    if (strftime (buf, sizeof (buf), "%B", &t) < 2) return 1;
78    for (p = buf; *p != '\0'; p++)
79      if ((unsigned char) *p >= 0x80 && (unsigned char) *p < 0xa0)
80        return 1;
81  }
82  return 0;
83#endif
84}
85changequote([,])dnl
86      ])])
87    if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
88      case "$host_os" in
89        # Handle native Windows specially, because there setlocale() interprets
90        # "ar" as "Arabic" or "Arabic_Saudi Arabia.1256",
91        # "fr" or "fra" as "French" or "French_France.1252",
92        # "ge"(!) or "deu"(!) as "German" or "German_Germany.1252",
93        # "ja" as "Japanese" or "Japanese_Japan.932",
94        # and similar.
95        mingw*)
96          # Note that on native Windows, the Japanese locale is
97          # Japanese_Japan.932, and CP932 is very different from EUC-JP, so we
98          # cannot use it here.
99          gt_cv_locale_ja=none
100          ;;
101        *)
102          # Setting LC_ALL is not enough. Need to set LC_TIME to empty, because
103          # otherwise on Mac OS X 10.3.5 the LC_TIME=C from the beginning of the
104          # configure script would override the LC_ALL setting. Likewise for
105          # LC_CTYPE, which is also set at the beginning of the configure script.
106          # Test for the AIX locale name.
107          if (LC_ALL=ja_JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
108            gt_cv_locale_ja=ja_JP
109          else
110            # Test for the locale name with explicit encoding suffix.
111            if (LC_ALL=ja_JP.EUC-JP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
112              gt_cv_locale_ja=ja_JP.EUC-JP
113            else
114              # Test for the HP-UX, OSF/1, NetBSD locale name.
115              if (LC_ALL=ja_JP.eucJP LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
116                gt_cv_locale_ja=ja_JP.eucJP
117              else
118                # Test for the IRIX, FreeBSD locale name.
119                if (LC_ALL=ja_JP.EUC LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
120                  gt_cv_locale_ja=ja_JP.EUC
121                else
122                  # Test for the Solaris 7 locale name.
123                  if (LC_ALL=ja LC_TIME= LC_CTYPE= ./conftest; exit) 2>/dev/null; then
124                    gt_cv_locale_ja=ja
125                  else
126                    # Special test for NetBSD 1.6.
127                    if test -f /usr/share/locale/ja_JP.eucJP/LC_CTYPE; then
128                      gt_cv_locale_ja=ja_JP.eucJP
129                    else
130                      # None found.
131                      gt_cv_locale_ja=none
132                    fi
133                  fi
134                fi
135              fi
136            fi
137          fi
138          ;;
139      esac
140    fi
141    rm -fr conftest*
142  ])
143  LOCALE_JA=$gt_cv_locale_ja
144  AC_SUBST([LOCALE_JA])
145])
146