Doc tweak.

[gnulib.git] / m4 / locale-zh.m4

diff --git a/m4/locale-zh.m4 b/m4/locale-zh.m4
index c7409a4..594f62a 100644 (file)
--- a/m4/locale-zh.m4
+++ b/m4/locale-zh.m4
@@ -1,5 +1,5 @@
-# locale-zh.m4 serial 1
-dnl Copyright (C) 2003, 2005-2007 Free Software Foundation, Inc.
+# locale-zh.m4 serial 4
+dnl Copyright (C) 2003, 2005-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -13,10 +13,12 @@ AC_DEFUN([gt_LOCALE_ZH_CN],
   AC_REQUIRE([AM_LANGINFO_CODESET])
   AC_CACHE_CHECK([for a transitional chinese locale], gt_cv_locale_zh_CN, [
     macosx=
+changequote(,)dnl
     case "$host_os" in
       darwin[56]*) ;;
       darwin*) macosx=yes;;
     esac
+changequote([,])dnl
     if test -n "$macosx"; then
       # On Darwin 7 (MacOS X), the libc supports some locales in non-UTF-8
       # encodings, but the kernel does not support them. The documentation
@@ -36,6 +38,8 @@ changequote(,)dnl
 #if HAVE_LANGINFO_CODESET
 # include <langinfo.h>
 #endif
+#include <stdlib.h>
+#include <string.h>
 struct tm t;
 char buf[16];
 int main ()
@@ -43,11 +47,24 @@ int main ()
   const char *p;
   /* Check whether the given locale name is recognized by the system.  */
   if (setlocale (LC_ALL, "") == NULL) return 1;
-  /* Check whether nl_langinfo(CODESET) is nonempty.
+  /* Check whether nl_langinfo(CODESET) is nonempty and not "ASCII" or "646".
      On MacOS X 10.3.5 (Darwin 7.5) in the fr_FR locale, nl_langinfo(CODESET)
-     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.  */
+     is empty, and the behaviour of Tcl 8.4 in this locale is not useful.
+     On OpenBSD 4.0, when an unsupported locale is specified, setlocale()
+     succeeds but then nl_langinfo(CODESET) is "646". In this situation,
+     some unit tests fail.  */
 #if HAVE_LANGINFO_CODESET
-  if (nl_langinfo (CODESET) [0] == '\0') return 1;
+  {
+    const char *cs = nl_langinfo (CODESET);
+    if (cs[0] == '\0' || strcmp (cs, "ASCII") == 0 || strcmp (cs, "646") == 0)
+      return 1;
+  }
+#endif
+#ifdef __CYGWIN__
+  /* On Cygwin, avoid locale names without encoding suffix, because the
+     locale_charset() function relies on the encoding suffix.  Note that
+     LC_ALL is set on the command line.  */
+  if (strchr (getenv ("LC_ALL"), '.') == NULL) return 1;
 #endif
   /* Check whether in a month name, no byte in the range 0x80..0x9F occurs.
      This excludes the UTF-8 encoding.  */