m4/locale_h.m4

   1 # locale_h.m4 serial 14
   2 dnl Copyright (C) 2007, 2009-2012 Free Software Foundation, Inc.
   3 dnl This file is free software; the Free Software Foundation
   4 dnl gives unlimited permission to copy and/or distribute it,
   5 dnl with or without modifications, as long as this notice is preserved.
   6
   7 AC_DEFUN([gl_LOCALE_H],
   8 [
   9   dnl Use AC_REQUIRE here, so that the default behavior below is expanded
  10   dnl once only, before all statements that occur in other macros.
  11   AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
  12
  13   dnl Persuade glibc <locale.h> to define locale_t.
  14   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
  15
  16   dnl If <stddef.h> is replaced, then <locale.h> must also be replaced.
  17   AC_REQUIRE([gl_STDDEF_H])
  18
  19   AC_CACHE_CHECK([whether locale.h conforms to POSIX:2001],
  20     [gl_cv_header_locale_h_posix2001],
  21     [AC_COMPILE_IFELSE(
  22        [AC_LANG_PROGRAM(
  23           [[#include <locale.h>
  24             int x = LC_MESSAGES;]],
  25           [[]])],
  26        [gl_cv_header_locale_h_posix2001=yes],
  27        [gl_cv_header_locale_h_posix2001=no])])
  28
  29   dnl Check for <xlocale.h>.
  30   AC_CHECK_HEADERS_ONCE([xlocale.h])
  31   if test $ac_cv_header_xlocale_h = yes; then
  32     HAVE_XLOCALE_H=1
  33     dnl Check whether use of locale_t requires inclusion of <xlocale.h>,
  34     dnl e.g. on MacOS X 10.5. If <locale.h> does not define locale_t by
  35     dnl itself, we assume that <xlocale.h> will do so.
  36     AC_CACHE_CHECK([whether locale.h defines locale_t],
  37       [gl_cv_header_locale_has_locale_t],
  38       [AC_COMPILE_IFELSE(
  39          [AC_LANG_PROGRAM(
  40             [[#include <locale.h>
  41               locale_t x;]],
  42             [[]])],
  43          [gl_cv_header_locale_has_locale_t=yes],
  44          [gl_cv_header_locale_has_locale_t=no])
  45       ])
  46     if test $gl_cv_header_locale_has_locale_t = yes; then
  47       gl_cv_header_locale_h_needs_xlocale_h=no
  48     else
  49       gl_cv_header_locale_h_needs_xlocale_h=yes
  50     fi
  51   else
  52     HAVE_XLOCALE_H=0
  53     gl_cv_header_locale_h_needs_xlocale_h=no
  54   fi
  55   AC_SUBST([HAVE_XLOCALE_H])
  56
  57   dnl <locale.h> is always overridden, because of GNULIB_POSIXCHECK.
  58   gl_NEXT_HEADERS([locale.h])
  59
  60   dnl Check for declarations of anything we want to poison if the
  61   dnl corresponding gnulib module is not in use.
  62   gl_WARN_ON_USE_PREPARE([[#include <locale.h>
  63 /* Some systems provide declarations in a non-standard header.  */
  64 #if HAVE_XLOCALE_H
  65 # include <xlocale.h>
  66 #endif
  67     ]],
  68     [setlocale duplocale])
  69 ])
  70
  71 AC_DEFUN([gl_LOCALE_MODULE_INDICATOR],
  72 [
  73   dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
  74   AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
  75   gl_MODULE_INDICATOR_SET_VARIABLE([$1])
  76   dnl Define it also as a C macro, for the benefit of the unit tests.
  77   gl_MODULE_INDICATOR_FOR_TESTS([$1])
  78 ])
  79
  80 AC_DEFUN([gl_LOCALE_H_DEFAULTS],
  81 [
  82   GNULIB_SETLOCALE=0;  AC_SUBST([GNULIB_SETLOCALE])
  83   GNULIB_DUPLOCALE=0;  AC_SUBST([GNULIB_DUPLOCALE])
  84   dnl Assume proper GNU behavior unless another module says otherwise.
  85   HAVE_DUPLOCALE=1;    AC_SUBST([HAVE_DUPLOCALE])
  86   REPLACE_SETLOCALE=0; AC_SUBST([REPLACE_SETLOCALE])
  87   REPLACE_DUPLOCALE=0; AC_SUBST([REPLACE_DUPLOCALE])
  88 ])