# locale_h.m4 serial 19

dnl Copyright (C) 2007, 2009-2017 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],

[

  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 and the int_p_*, int_n_*

  dnl members of 'struct lconv'.

  AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])

  dnl If <stddef.h> is replaced, then <locale.h> must also be replaced.

  AC_REQUIRE([gl_STDDEF_H])

  dnl Solaris 11 2011-11 defines the int_p_*, int_n_* members of 'struct lconv'

  dnl only if _LCONV_C99 is defined.

  AC_REQUIRE([AC_CANONICAL_HOST])

  case "$host_os" in

    solaris*)

      AC_DEFINE([_LCONV_C99], [1], [Define to 1 on Solaris.])

      ;;

  esac

  AC_CACHE_CHECK([whether locale.h conforms to POSIX:2001],

    [gl_cv_header_locale_h_posix2001],

    [AC_COMPILE_IFELSE(

       [AC_LANG_PROGRAM(

          [[#include <locale.h>

            int x = LC_MESSAGES;

            int y = sizeof (((struct lconv *) 0)->decimal_point);]],

          [[]])],

       [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 Mac OS 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_COMPILE_IFELSE(

         [AC_LANG_PROGRAM(

            [[#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

    HAVE_XLOCALE_H=0

    gl_cv_header_locale_h_needs_xlocale_h=no

  fi

  AC_SUBST([HAVE_XLOCALE_H])

  dnl Check whether 'struct lconv' is complete.

  dnl Bionic libc's 'struct lconv' is just a dummy.

  dnl On OpenBSD 4.9, HP-UX 11, IRIX 6.5, OSF/1 5.1, Solaris 9, Cygwin 1.5.x,

  dnl mingw, MSVC 9, it lacks the int_p_* and int_n_* members.

  AC_CACHE_CHECK([whether struct lconv is properly defined],

    [gl_cv_sys_struct_lconv_ok],

    [AC_COMPILE_IFELSE(

       [AC_LANG_PROGRAM(

          [[#include <locale.h>

            struct lconv l;

            int x = sizeof (l.decimal_point);

            int y = sizeof (l.int_p_cs_precedes);]],

          [[]])],

       [gl_cv_sys_struct_lconv_ok=yes],

       [gl_cv_sys_struct_lconv_ok=no])

    ])

  if test $gl_cv_sys_struct_lconv_ok = no; then

    REPLACE_STRUCT_LCONV=1

  fi

  dnl <locale.h> is always overridden, because of GNULIB_POSIXCHECK.

  gl_NEXT_HEADERS([locale.h])

  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

    ]],

    [setlocale duplocale])

])

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])

  gl_MODULE_INDICATOR_SET_VARIABLE([$1])

  dnl Define it also as a C macro, for the benefit of the unit tests.

  gl_MODULE_INDICATOR_FOR_TESTS([$1])

])

AC_DEFUN([gl_LOCALE_H_DEFAULTS],

[

  GNULIB_LOCALECONV=0; AC_SUBST([GNULIB_LOCALECONV])

  GNULIB_SETLOCALE=0;  AC_SUBST([GNULIB_SETLOCALE])

  GNULIB_DUPLOCALE=0;  AC_SUBST([GNULIB_DUPLOCALE])

  dnl Assume proper GNU behavior unless another module says otherwise.

  HAVE_DUPLOCALE=1;       AC_SUBST([HAVE_DUPLOCALE])

  REPLACE_LOCALECONV=0;   AC_SUBST([REPLACE_LOCALECONV])

  REPLACE_SETLOCALE=0;    AC_SUBST([REPLACE_SETLOCALE])

  REPLACE_DUPLOCALE=0;    AC_SUBST([REPLACE_DUPLOCALE])

  REPLACE_STRUCT_LCONV=0; AC_SUBST([REPLACE_STRUCT_LCONV])

])