old_contents: ##############################################################################
  # Copyright (c) 2013-2016, Lawrence Livermore National Security, LLC.
  # Produced at the Lawrence Livermore National Laboratory.
  #
  # This file is part of Spack.
  # Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
  # LLNL-CODE-647188
  #
  # For details, see https://github.com/llnl/spack
  # Please also see the LICENSE file for our notice and the LGPL.
  #
  # This program is free software; you can redistribute it and/or modify
  # it under the terms of the GNU Lesser General Public License (as
  # published by the Free Software Foundation) version 2.1, February 1999.
  #
  # This program is distributed in the hope that it will be useful, but
  # WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
  # conditions of the GNU Lesser General Public License for more details.
  #
  # You should have received a copy of the GNU Lesser General Public
  # License along with this program; if not, write to the Free Software
  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  ##############################################################################
  from spack import *
  
  
  class Elfutils(AutotoolsPackage):
      """elfutils is a collection of various binary tools such as
      eu-objdump, eu-readelf, and other utilities that allow you to
      inspect and manipulate ELF files. Refer to Table 5.Tools Included
      in elfutils for Red Hat Developer for a complete list of binary
      tools that are distributed with the Red Hat Developer Toolset
      version of elfutils."""
  
      homepage = "https://fedorahosted.org/elfutils/"
  
      url      = "https://sourceware.org/elfutils/ftp/0.168/elfutils-0.168.tar.bz2"
      list_url = "https://sourceware.org/elfutils/ftp"
      list_depth = 2
  
      version('0.168','52adfa40758d0d39e5d5c57689bf38d6')
      version('0.163','77ce87f259987d2e54e4d87b86cbee41')
  
      provides('elf@1')
  
      def configure_args(self):
          return ['--enable-maintainer-mode']
  
new_contents: ##############################################################################
  # Copyright (c) 2013-2016, Lawrence Livermore National Security, LLC.
  # Produced at the Lawrence Livermore National Laboratory.
  #
  # This file is part of Spack.
  # Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
  # LLNL-CODE-647188
  #
  # For details, see https://github.com/llnl/spack
  # Please also see the LICENSE file for our notice and the LGPL.
  #
  # This program is free software; you can redistribute it and/or modify
  # it under the terms of the GNU Lesser General Public License (as
  # published by the Free Software Foundation) version 2.1, February 1999.
  #
  # This program is distributed in the hope that it will be useful, but
  # WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
  # conditions of the GNU Lesser General Public License for more details.
  #
  # You should have received a copy of the GNU Lesser General Public
  # License along with this program; if not, write to the Free Software
  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  ##############################################################################
  from spack import *
  
  
  class Elfutils(AutotoolsPackage):
      """elfutils is a collection of various binary tools such as
      eu-objdump, eu-readelf, and other utilities that allow you to
      inspect and manipulate ELF files. Refer to Table 5.Tools Included
      in elfutils for Red Hat Developer for a complete list of binary
      tools that are distributed with the Red Hat Developer Toolset
      version of elfutils."""
  
      homepage = "https://fedorahosted.org/elfutils/"
  
      url      = "https://sourceware.org/elfutils/ftp/0.168/elfutils-0.168.tar.bz2"
      list_url = "https://sourceware.org/elfutils/ftp"
      list_depth = 2
  
      version('0.168','52adfa40758d0d39e5d5c57689bf38d6')
      version('0.163','77ce87f259987d2e54e4d87b86cbee41', preferred=True)
  
      provides('elf@1')
  
      def configure_args(self):
          return ['--enable-maintainer-mode']
  
subject: Make 0.163 the preferred version of elfutils.