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annotate m4/locale_h.m4 @ 12547:6d50d2a81c7d

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Further updates, following today's commits.
author Bruno Haible <bruno@clisp.org>
date Thu, 31 Dec 2009 22:41:49 +0100
parents cd64e80f94e4
children c2cbabec01dd
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1 # locale_h.m4 serial 6
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2 dnl Copyright (C) 2007, 2009 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_LOCALE_H],
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8 [
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9 dnl Use AC_REQUIRE here, so that the default behavior below is expanded
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10 dnl once only, before all statements that occur in other macros.
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11 AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
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12
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13 dnl Persuade glibc <locale.h> to define locale_t.
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14 AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
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15
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16 dnl If <stddef.h> is replaced, then <locale.h> must also be replaced.
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17 AC_REQUIRE([gl_STDDEF_H])
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18
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19 AC_CACHE_CHECK([whether locale.h conforms to POSIX:2001],
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20 [gl_cv_header_locale_h_posix2001],
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21 [AC_TRY_COMPILE([#include <locale.h>
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22 int x = LC_MESSAGES;], [],
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23 [gl_cv_header_locale_h_posix2001=yes],
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24 [gl_cv_header_locale_h_posix2001=no])])
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25
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26 dnl Check for <xlocale.h>.
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27 AC_CHECK_HEADERS_ONCE([xlocale.h])
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28 if test $ac_cv_header_xlocale_h = yes; then
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29 HAVE_XLOCALE_H=1
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30 dnl Check whether use of locale_t requires inclusion of <xlocale.h>,
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31 dnl e.g. on MacOS X 10.5. If <locale.h> does not define locale_t by
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32 dnl itself, we assume that <xlocale.h> will do so.
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33 AC_CACHE_CHECK([whether locale.h defines locale_t],
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34 [gl_cv_header_locale_has_locale_t],
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35 [AC_TRY_COMPILE([#include <locale.h>
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36 locale_t x;], [],
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37 [gl_cv_header_locale_has_locale_t=yes],
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38 [gl_cv_header_locale_has_locale_t=no])
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39 ])
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40 if test $gl_cv_header_locale_has_locale_t = yes; then
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41 gl_cv_header_locale_h_needs_xlocale_h=no
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42 else
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43 gl_cv_header_locale_h_needs_xlocale_h=yes
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44 fi
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45 else
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46 HAVE_XLOCALE_H=0
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47 gl_cv_header_locale_h_needs_xlocale_h=no
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48 fi
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49 AC_SUBST([HAVE_XLOCALE_H])
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50
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51 dnl <locale.h> is always overridden, because of GNULIB_POSIXCHECK.
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52 gl_CHECK_NEXT_HEADERS([locale.h])
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53
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54 if test -n "$STDDEF_H" \
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55 || test $gl_cv_header_locale_h_posix2001 = no \
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56 || test $gl_cv_header_locale_h_needs_xlocale_h = yes; then
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57 gl_REPLACE_LOCALE_H
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58 fi
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59 ])
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60
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61 dnl Unconditionally enables the replacement of <locale.h>.
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62 AC_DEFUN([gl_REPLACE_LOCALE_H],
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63 [
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64 dnl This is a no-op, because <locale.h> is always overridden.
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65 :
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66 ])
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67
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68 AC_DEFUN([gl_LOCALE_MODULE_INDICATOR],
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69 [
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70 dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
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71 AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
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72 GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
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73 ])
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74
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75 AC_DEFUN([gl_LOCALE_H_DEFAULTS],
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76 [
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77 GNULIB_DUPLOCALE=0; AC_SUBST([GNULIB_DUPLOCALE])
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78 dnl Assume proper GNU behavior unless another module says otherwise.
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79 REPLACE_DUPLOCALE=0; AC_SUBST([REPLACE_DUPLOCALE])
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80 ])