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# gives unlimited permission to copy and/or distribute it,

# with or without modifications, as long as this notice is preserved.

# _AM_SUBST_NOTMAKE(VARIABLE)

# ---------------------------

# Prevent Automake from outputting VARIABLE = @VARIABLE@ in Makefile.in.

# This macro is traced by Automake.

AC_DEFUN([_AM_SUBST_NOTMAKE])

# AM_SUBST_NOTMAKE(VARIABLE)

# --------------------------

# Public sister of _AM_SUBST_NOTMAKE.

AC_DEFUN([AM_SUBST_NOTMAKE], [_AM_SUBST_NOTMAKE($@)])

# Check how to create a tarball.                            -*- Autoconf -*-

# Copyright (C) 2004-2014 Free Software Foundation, Inc.

#

# This file is free software; the Free Software Foundation

# gives unlimited permission to copy and/or distribute it,

# with or without modifications, as long as this notice is preserved.

# _AM_PROG_TAR(FORMAT)

# --------------------

# Check how to create a tarball in format FORMAT.

# FORMAT should be one of 'v7', 'ustar', or 'pax'.

#

# Substitute a variable $(am__tar) that is a command

# writing to stdout a FORMAT-tarball containing the directory

# $tardir.

#     tardir=directory && $(am__tar) > result.tar

#

# Substitute a variable $(am__untar) that extract such

# a tarball read from stdin.

#     $(am__untar) < result.tar

#

AC_DEFUN([_AM_PROG_TAR],

[# Always define AMTAR for backward compatibility.  Yes, it's still used

# in the wild :-(  We should find a proper way to deprecate it ...

AC_SUBST([AMTAR], ['$${TAR-tar}'])

# We'll loop over all known methods to create a tar archive until one works.

_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'

m4_if([$1], [v7],

  [am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'],

  [m4_case([$1],

    [ustar],

     [# The POSIX 1988 'ustar' format is defined with fixed-size fields.

      # There is notably a 21 bits limit for the UID and the GID.  In fact,

      # the 'pax' utility can hang on bigger UID/GID (see automake bug#8343

      # and bug#13588).

      am_max_uid=2097151 # 2^21 - 1

      am_max_gid=$am_max_uid

      # The $UID and $GID variables are not portable, so we need to resort

      # to the POSIX-mandated id(1) utility.  Errors in the 'id' calls

      # below are definitely unexpected, so allow the users to see them

      # (that is, avoid stderr redirection).

      am_uid=`id -u || echo unknown`

      am_gid=`id -g || echo unknown`

      AC_MSG_CHECKING([whether UID '$am_uid' is supported by ustar format])

      if test $am_uid -le $am_max_uid; then

         AC_MSG_RESULT([yes])

      else

         AC_MSG_RESULT([no])

         _am_tools=none

      fi

      AC_MSG_CHECKING([whether GID '$am_gid' is supported by ustar format])

      if test $am_gid -le $am_max_gid; then

         AC_MSG_RESULT([yes])

      else

        AC_MSG_RESULT([no])

        _am_tools=none

      fi],

  [pax],

    [],

  [m4_fatal([Unknown tar format])])

  AC_MSG_CHECKING([how to create a $1 tar archive])

  # Go ahead even if we have the value already cached.  We do so because we

  # need to set the values for the 'am__tar' and 'am__untar' variables.

  _am_tools=${am_cv_prog_tar_$1-$_am_tools}

  for _am_tool in $_am_tools; do

    case $_am_tool in

    gnutar)

      for _am_tar in tar gnutar gtar; do

        AM_RUN_LOG([$_am_tar --version]) && break

      done

      am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$tardir"'

      am__tar_="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$tardir"'

      am__untar="$_am_tar -xf -"

      ;;

    plaintar)

      # Must skip GNU tar: if it does not support --format= it doesn't create

      # ustar tarball either.

      (tar --version) >/dev/null 2>&1 && continue

      am__tar='tar chf - "$$tardir"'

      am__tar_='tar chf - "$tardir"'

      am__untar='tar xf -'

      ;;

    pax)

      am__tar='pax -L -x $1 -w "$$tardir"'

      am__tar_='pax -L -x $1 -w "$tardir"'

      am__untar='pax -r'

      ;;

    cpio)

      am__tar='find "$$tardir" -print | cpio -o -H $1 -L'

      am__tar_='find "$tardir" -print | cpio -o -H $1 -L'

      am__untar='cpio -i -H $1 -d'

      ;;

    none)

      am__tar=false

      am__tar_=false

      am__untar=false

      ;;

    esac

    # If the value was cached, stop now.  We just wanted to have am__tar

    # and am__untar set.

    test -n "${am_cv_prog_tar_$1}" && break

    # tar/untar a dummy directory, and stop if the command works.

    rm -rf conftest.dir

    mkdir conftest.dir

    echo GrepMe > conftest.dir/file

    AM_RUN_LOG([tardir=conftest.dir && eval $am__tar_ >conftest.tar])

    rm -rf conftest.dir

    if test -s conftest.tar; then

      AM_RUN_LOG([$am__untar 

      AM_RUN_LOG([cat conftest.dir/file])

      grep GrepMe conftest.dir/file >/dev/null 2>&1 && break

    fi

  done

  rm -rf conftest.dir

  AC_CACHE_VAL([am_cv_prog_tar_$1], [am_cv_prog_tar_$1=$_am_tool])

  AC_MSG_RESULT([$am_cv_prog_tar_$1])])

AC_SUBST([am__tar])

AC_SUBST([am__untar])

]) # _AM_PROG_TAR