# wcrtomb.m4 serial 12

dnl Copyright (C) 2008-2018 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_FUNC_WCRTOMB],

[

  AC_REQUIRE([gl_WCHAR_H_DEFAULTS])

  AC_REQUIRE([AC_TYPE_MBSTATE_T])

  gl_MBSTATE_T_BROKEN

  AC_CHECK_FUNCS_ONCE([wcrtomb])

  if test $ac_cv_func_wcrtomb = no; then

    HAVE_WCRTOMB=0

    AC_CHECK_DECLS([wcrtomb],,, [[

/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before

   <wchar.h>.

   BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be

   included before <wchar.h>.  */

#include <stddef.h>

#include <stdio.h>

#include <time.h>

#include <wchar.h>

]])

    if test $ac_cv_have_decl_wcrtomb = yes; then

      dnl On Minix 3.1.8, the system's <wchar.h> declares wcrtomb() although

      dnl it does not have the function. Avoid a collision with gnulib's

      dnl replacement.

      REPLACE_WCRTOMB=1

    fi

  else

    if test $REPLACE_MBSTATE_T = 1; then

      REPLACE_WCRTOMB=1

    else

      dnl On AIX 4.3, OSF/1 5.1 and Solaris 10, wcrtomb (NULL, 0, NULL) sometimes

      dnl returns 0 instead of 1.

      AC_REQUIRE([AC_PROG_CC])

      AC_REQUIRE([gt_LOCALE_FR])

      AC_REQUIRE([gt_LOCALE_FR_UTF8])

      AC_REQUIRE([gt_LOCALE_JA])

      AC_REQUIRE([gt_LOCALE_ZH_CN])

      AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles

      AC_CACHE_CHECK([whether wcrtomb return value is correct],

        [gl_cv_func_wcrtomb_retval],

        [

          dnl Initial guess, used when cross-compiling or when no suitable locale

          dnl is present.

changequote(,)dnl

          case "$host_os" in

                                     # Guess no on AIX 4, OSF/1 and Solaris.

            aix4* | osf* | solaris*) gl_cv_func_wcrtomb_retval="guessing no" ;;

                                     # Guess yes on native Windows.

            mingw*)                  gl_cv_func_wcrtomb_retval="guessing yes" ;;

                                     # Guess yes otherwise.

            *)                       gl_cv_func_wcrtomb_retval="guessing yes" ;;

          esac

changequote([,])dnl

          if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then

            AC_RUN_IFELSE(

              [AC_LANG_SOURCE([[

#include <locale.h>

#include <string.h>

/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before

   <wchar.h>.

   BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be

   included before <wchar.h>.  */

#include <stddef.h>

#include <stdio.h>

#include <time.h>

#include <wchar.h>

int main ()

{

  int result = 0;

  if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)

    {

      if (wcrtomb (NULL, 0, NULL) != 1)

        result |= 1;

    }

  if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)

    {

      if (wcrtomb (NULL, 0, NULL) != 1)

        result |= 2;

    }

  if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)

    {

      if (wcrtomb (NULL, 0, NULL) != 1)

        result |= 4;

    }

  if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)

    {

      if (wcrtomb (NULL, 0, NULL) != 1)

        result |= 8;

    }

  return result;

}]])],

              [gl_cv_func_wcrtomb_retval=yes],

              [gl_cv_func_wcrtomb_retval=no],

              [:])

          fi

        ])

      case "$gl_cv_func_wcrtomb_retval" in

        *yes) ;;

        *) REPLACE_WCRTOMB=1 ;;

      esac

    fi

  fi

])

# Prerequisites of lib/wcrtomb.c.

AC_DEFUN([gl_PREREQ_WCRTOMB], [

  :

])