-# locale_h.m4 serial 2
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# locale_h.m4 serial 7
+dnl Copyright (C) 2007, 2009, 2010 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.
AC_DEFUN([gl_LOCALE_H],
[
- AC_CACHE_CHECK([whether locale.h conforms to POSIX],
- [gl_cv_header_working_locale_h],
+ dnl Use AC_REQUIRE here, so that the default behavior below is expanded
+ dnl once only, before all statements that occur in other macros.
+ AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
+
+ dnl Persuade glibc <locale.h> to define locale_t.
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+ dnl If <stddef.h> is replaced, then <locale.h> must also be replaced.
+ AC_REQUIRE([gl_STDDEF_H])
+
+ AC_CACHE_CHECK([whether locale.h conforms to POSIX:2001],
+ [gl_cv_header_locale_h_posix2001],
[AC_TRY_COMPILE([#include <locale.h>
int x = LC_MESSAGES;], [],
- [gl_cv_header_working_locale_h=yes],
- [gl_cv_header_working_locale_h=no])])
- if test $gl_cv_header_working_locale_h = yes; then
- LOCALE_H=
+ [gl_cv_header_locale_h_posix2001=yes],
+ [gl_cv_header_locale_h_posix2001=no])])
+
+ dnl Check for <xlocale.h>.
+ AC_CHECK_HEADERS_ONCE([xlocale.h])
+ if test $ac_cv_header_xlocale_h = yes; then
+ HAVE_XLOCALE_H=1
+ dnl Check whether use of locale_t requires inclusion of <xlocale.h>,
+ dnl e.g. on MacOS X 10.5. If <locale.h> does not define locale_t by
+ dnl itself, we assume that <xlocale.h> will do so.
+ AC_CACHE_CHECK([whether locale.h defines locale_t],
+ [gl_cv_header_locale_has_locale_t],
+ [AC_TRY_COMPILE([#include <locale.h>
+locale_t x;], [],
+ [gl_cv_header_locale_has_locale_t=yes],
+ [gl_cv_header_locale_has_locale_t=no])
+ ])
+ if test $gl_cv_header_locale_has_locale_t = yes; then
+ gl_cv_header_locale_h_needs_xlocale_h=no
+ else
+ gl_cv_header_locale_h_needs_xlocale_h=yes
+ fi
else
- gl_CHECK_NEXT_HEADERS([locale.h])
- LOCALE_H=locale.h
+ HAVE_XLOCALE_H=0
+ gl_cv_header_locale_h_needs_xlocale_h=no
fi
- AC_SUBST([LOCALE_H])
+ AC_SUBST([HAVE_XLOCALE_H])
+
+ dnl <locale.h> is always overridden, because of GNULIB_POSIXCHECK.
+ gl_CHECK_NEXT_HEADERS([locale.h])
+
+ if test -n "$STDDEF_H" \
+ || test $gl_cv_header_locale_h_posix2001 = no \
+ || test $gl_cv_header_locale_h_needs_xlocale_h = yes; then
+ gl_REPLACE_LOCALE_H
+ fi
+
+ dnl Check for declarations of anything we want to poison if the
+ dnl corresponding gnulib module is not in use.
+ gl_WARN_ON_USE_PREPARE([[#include <locale.h>
+/* Some systems provide declarations in a non-standard header. */
+#if HAVE_XLOCALE_H
+# include <xlocale.h>
+#endif
+ ]], [duplocale])
+])
+
+dnl Unconditionally enables the replacement of <locale.h>.
+AC_DEFUN([gl_REPLACE_LOCALE_H],
+[
+ dnl This is a no-op, because <locale.h> is always overridden.
+ :
+])
+
+AC_DEFUN([gl_LOCALE_MODULE_INDICATOR],
+[
+ dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
+ AC_REQUIRE([gl_LOCALE_H_DEFAULTS])
+ GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1
+])
+
+AC_DEFUN([gl_LOCALE_H_DEFAULTS],
+[
+ GNULIB_DUPLOCALE=0; AC_SUBST([GNULIB_DUPLOCALE])
+ dnl Assume proper GNU behavior unless another module says otherwise.
+ REPLACE_DUPLOCALE=0; AC_SUBST([REPLACE_DUPLOCALE])
])