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annotate m4/duplocale.m4 @ 17252:7a29ec33d6c5

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author Karl Berry <karl@freefriends.org>
date Tue, 01 Jan 2013 09:17:08 -0800
parents e542fd46ad6f
children 344018b6e5d7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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14933
45dddbc362fb duplocale: Move AC_LIBOBJ invocations to module description.
Bruno Haible <bruno@clisp.org>
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1 # duplocale.m4 serial 7
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Eric Blake <eblake@redhat.com>
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2 dnl Copyright (C) 2009-2013 Free Software Foundation, Inc.
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3 dnl This file is free software; the Free Software Foundation
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4 dnl gives unlimited permission to copy and/or distribute it,
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5 dnl with or without modifications, as long as this notice is preserved.
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6
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7 AC_DEFUN([gl_FUNC_DUPLOCALE],
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8 [
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9 AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
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10 AC_REQUIRE([AC_CANONICAL_HOST])
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11 AC_CHECK_FUNCS_ONCE([duplocale])
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12 if test $ac_cv_func_duplocale = yes; then
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13 dnl Check against glibc bug where duplocale crashes.
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14 dnl See <http://sourceware.org/bugzilla/show_bug.cgi?id=10969>.
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15 dnl Also, on AIX 7.1, duplocale(LC_GLOBAL_LOCALE) returns (locale_t)0 with
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16 dnl errno set to EINVAL.
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17 AC_REQUIRE([gl_LOCALE_H])
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18 AC_CACHE_CHECK([whether duplocale(LC_GLOBAL_LOCALE) works],
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19 [gl_cv_func_duplocale_works],
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20 [AC_RUN_IFELSE(
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21 [AC_LANG_SOURCE([[
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22 #include <locale.h>
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23 #if HAVE_XLOCALE_H
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24 # include <xlocale.h>
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25 #endif
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26 int main ()
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27 {
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28 if (duplocale (LC_GLOBAL_LOCALE) == (locale_t)0)
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29 return 1;
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30 return 0;
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31 }]])],
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32 [gl_cv_func_duplocale_works=yes],
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33 [gl_cv_func_duplocale_works=no],
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34 [dnl Guess it works except on glibc < 2.12, uClibc, and AIX.
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35 case "$host_os" in
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36 aix*) gl_cv_func_duplocale_works="guessing no";;
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37 *-gnu*)
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38 AC_EGREP_CPP([Unlucky], [
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39 #include <features.h>
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40 #ifdef __GNU_LIBRARY__
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41 #if (__GLIBC__ == 2 && __GLIBC_MINOR__ < 12)
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42 Unlucky GNU user
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43 #endif
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44 #endif
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45 #ifdef __UCLIBC__
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46 Unlucky user
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47 #endif
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48 ],
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49 [gl_cv_func_duplocale_works="guessing no"],
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50 [gl_cv_func_duplocale_works="guessing yes"])
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51 ;;
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52 *) gl_cv_func_duplocale_works="guessing yes";;
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53 esac
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54 ])
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55 ])
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56 case "$gl_cv_func_duplocale_works" in
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57 *no) REPLACE_DUPLOCALE=1 ;;
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58 esac
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59 else
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60 HAVE_DUPLOCALE=0
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61 fi
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62 ])
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63
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64 # Prerequisites of lib/duplocale.c.
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65 AC_DEFUN([gl_PREREQ_DUPLOCALE],
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66 [
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67 :
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68 ])