# nl_langinfo.m4 serial 6

dnl Copyright (C) 2009-2018 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_NL_LANGINFO],

[

  AC_REQUIRE([gl_LANGINFO_H_DEFAULTS])

  AC_REQUIRE([gl_LANGINFO_H])

  AC_CHECK_FUNCS_ONCE([nl_langinfo])

  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles

  if test $ac_cv_func_nl_langinfo = yes; then

    # On Irix 6.5, YESEXPR is defined, but nl_langinfo(YESEXPR) is broken.

    AC_CACHE_CHECK([whether YESEXPR works],

      [gl_cv_func_nl_langinfo_yesexpr_works],

      [AC_RUN_IFELSE(

         [AC_LANG_PROGRAM([[#include <langinfo.h>

]], [[return !*nl_langinfo(YESEXPR);

]])],

         [gl_cv_func_nl_langinfo_yesexpr_works=yes],

         [gl_cv_func_nl_langinfo_yesexpr_works=no],

         [

         case "$host_os" in

                   # Guess no on irix systems.

           irix*)  gl_cv_func_nl_langinfo_yesexpr_works="guessing no";;

                   # Guess yes elsewhere.

           *)      gl_cv_func_nl_langinfo_yesexpr_works="guessing yes";;

         esac

         ])

      ])

    case $gl_cv_func_nl_langinfo_yesexpr_works in

      *yes) FUNC_NL_LANGINFO_YESEXPR_WORKS=1 ;;

      *)    FUNC_NL_LANGINFO_YESEXPR_WORKS=0 ;;

    esac

    AC_DEFINE_UNQUOTED([FUNC_NL_LANGINFO_YESEXPR_WORKS],

      [$FUNC_NL_LANGINFO_YESEXPR_WORKS],

      [Define to 1 if nl_langinfo (YESEXPR) returns a non-empty string.])

    if test $HAVE_LANGINFO_CODESET = 1 \

       && test $HAVE_LANGINFO_T_FMT_AMPM = 1 \

       && test $HAVE_LANGINFO_ALTMON = 1 \

       && test $HAVE_LANGINFO_ERA = 1 \

       && test $FUNC_NL_LANGINFO_YESEXPR_WORKS = 1; then

      :

    else

      REPLACE_NL_LANGINFO=1

      AC_DEFINE([REPLACE_NL_LANGINFO], [1],

        [Define if nl_langinfo exists but is overridden by gnulib.])

    fi

  else

    HAVE_NL_LANGINFO=0

  fi

])