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        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 <conftest.tar])
        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
  
  m4_include([../../../m4/kpse-common.m4])
  m4_include([../../../m4/kpse-luajit-flags.m4])
  m4_include([../../../m4/kpse-search-libs.m4])
  m4_include([../../../m4/kpse-warnings.m4])
  