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 LinuxHeaders(Package):
      """The Linux kernel headers."""
  
      homepage = "https://www.kernel.org/"
      url      = "https://www.kernel.org/pub/linux/kernel/v4.x/linux-4.9.10.tar.xz"
      list_url = "https://www.kernel.org/pub/linux/kernel"
      list_depth = 2
  
      version('4.9.10', 'ce5ab2a86c9b880617e36e84aa2deb6c')
  
      def setup_environment(self, spack_env, run_env):
          # This variable is used in the Makefile. If it is defined on the
          # system, it can break the build if there is no build recipe for
          # that specific ARCH
          spack_env.unset('ARCH')
  
      def install(self, spec, prefix):
          make('headers_install', 'INSTALL_HDR_PATH={0}'.format(prefix))
  
subject: Add linux-headers package (#3547)