new_contents: ##############################################################################
  # Copyright (c) 2013-2017, 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/spack/spack
  # Please also see the NOTICE and LICENSE files 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 Graph500(MakefilePackage):
      """Graph500 reference implementations."""
  
      homepage = "https://graph500.org"
      url      = "https://github.com/graph500/graph500/archive/graph500-3.0.0.tar.gz"
  
      version('3.0.0', 'a2ebb4783b21e2d86387a217776395e3')
  
      depends_on('mpi@2.0:')
  
      build_directory = 'src'
  
      def edit(self, spec, prefix):
          makefile = FileFilter(join_path(self.build_directory, 'Makefile'))
          makefile.filter(r'^MPICC\s*=.*', 'MPICC={0}'.format(spec['mpi'].mpicc))
  
      def install(self, spec, prefix):
          with working_dir(self.build_directory):
              mkdir(prefix.bin)
              install('graph500_reference_bfs', prefix.bin)
              install('graph500_reference_bfs_sssp', prefix.bin)
              install('graph500_custom_bfs', prefix.bin)
              install('graph500_custom_bfs_sssp', prefix.bin)
  
subject: Add a new package: graph500. (#7499)