-# Check how to create a tarball. -*- Autoconf -*-
-
-# Copyright (C) 2004, 2005 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.
-
-# serial 2
-
-# _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.
-AM_MISSING_PROG([AMTAR], [tar])
-m4_if([$1], [v7],
- [am__tar='${AMTAR} chof - "$$tardir"'; am__untar='${AMTAR} xf -'],
- [m4_case([$1], [ustar],, [pax],,
- [m4_fatal([Unknown tar format])])
-AC_MSG_CHECKING([how to create a $1 tar archive])
-# Loop over all known methods to create a tar archive until one works.
-_am_tools='gnutar m4_if([$1], [ustar], [plaintar]) pax cpio none'
-_am_tools=${am_cv_prog_tar_$1-$_am_tools}
-# Do not fold the above two line into one, because Tru64 sh and
-# Solaris sh will not grok spaces in the rhs of `-'.
-for _am_tool in $_am_tools
-do
- case $_am_tool in
- gnutar)
- for _am_tar in tar gnutar gtar;
- do
- AM_RUN_LOG([$_am_tar --version]) && break
- done
- am__tar="$_am_tar --format=m4_if([$1], [pax], [posix], [$1]) -chf - "'"$$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 <conftest.tar])
- 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
-