# setlocale.m4 serial 7

dnl Copyright (C) 2011-2020 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_SETLOCALE],

[

  AC_REQUIRE([gl_LOCALE_H_DEFAULTS])

  AC_REQUIRE([gl_FUNC_SETLOCALE_NULL])

  AC_REQUIRE([AC_CANONICAL_HOST])

  dnl Test whether we need to improve on the general working of setlocale.

  NEED_SETLOCALE_IMPROVED=0

  case "$host_os" in

    dnl On native Windows systems, setlocale(category,NULL) does not look at

    dnl the environment variables LC_ALL, category, and LANG.

    mingw*) NEED_SETLOCALE_IMPROVED=1 ;;

    dnl On Cygwin 1.5.x, setlocale always succeeds but setlocale(LC_CTYPE,NULL)

    dnl is then still "C".

    cygwin*)

      case `uname -r` in

        1.5.*) NEED_SETLOCALE_IMPROVED=1 ;;

      esac

      ;;

    dnl On Android 4.3, setlocale(category,"C") always fails.

    *)

      AC_CACHE_CHECK([whether setlocale supports the C locale],

        [gl_cv_func_setlocale_works],

        [AC_RUN_IFELSE(

           [AC_LANG_SOURCE([[

#include <locale.h>

int main ()

{

  return setlocale (LC_ALL, "C") == NULL;

}]])],

           [gl_cv_func_setlocale_works=yes],

           [gl_cv_func_setlocale_works=no],

           [case "$host_os" in

                               # Guess no on Android.

              linux*-android*) gl_cv_func_setlocale_works="guessing no";;

                               # Guess yes otherwise.

              *)               gl_cv_func_setlocale_works="guessing yes";;

            esac

           ])

        ])

      case "$gl_cv_func_setlocale_works" in

        *yes) ;;

        *) NEED_SETLOCALE_IMPROVED=1 ;;

      esac

      ;;

  esac

  AC_DEFINE_UNQUOTED([NEED_SETLOCALE_IMPROVED], [$NEED_SETLOCALE_IMPROVED],

    [Define to 1 to enable general improvements of setlocale.])

  dnl Test whether we need a multithread-safe setlocale(category,NULL).

  NEED_SETLOCALE_MTSAFE=0

  if test $SETLOCALE_NULL_ALL_MTSAFE = 0 || test $SETLOCALE_NULL_ONE_MTSAFE = 0; then

    NEED_SETLOCALE_MTSAFE=1

  fi

  AC_DEFINE_UNQUOTED([NEED_SETLOCALE_MTSAFE], [$NEED_SETLOCALE_MTSAFE],

    [Define to 1 to enable a multithread-safety fix of setlocale.])

  if test $NEED_SETLOCALE_IMPROVED = 1 || test $NEED_SETLOCALE_MTSAFE = 1; then

    REPLACE_SETLOCALE=1

  fi

  if test $NEED_SETLOCALE_MTSAFE = 1; then

    LIB_SETLOCALE="$LIB_SETLOCALE_NULL"

  else

    LIB_SETLOCALE=

  fi

  dnl LIB_SETLOCALE is expected to be '-pthread' or '-lpthread' on AIX with gcc

  dnl or xlc, and empty otherwise.

  AC_SUBST([LIB_SETLOCALE])

])

# Prerequisites of lib/setlocale.c.

AC_DEFUN([gl_PREREQ_SETLOCALE],

[

  dnl No need to check for CFLocaleCopyPreferredLanguages and

  dnl CFPreferencesCopyAppValue because lib/setlocale.c is not used on Mac OS X.

  dnl (The Mac OS X specific code is only used in libintl.)

  :

])