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 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 Cub(Package):
      """CUB is a C++ header library of cooperative threadblock primitives
      and other utilities for CUDA kernel programming."""
  
      homepage = "https://nvlabs.github.com/cub"
      url      = "https://github.com/NVlabs/cub/archive/1.6.4.zip"
  
      version('1.6.4', '924fc12c0efb17264c3ad2d611ed1c51')
      version('1.4.1', '74a36eb84e5b5f0bf54aa3df39f660b2')
  
      def install(self, spec, prefix):
          mkdirp(prefix.include)
          install_tree('cub', join_path(prefix.include, 'cub'))
  
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 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 Cub(Package):
      """CUB is a C++ header library of cooperative threadblock primitives
      and other utilities for CUDA kernel programming."""
  
      homepage = "https://nvlabs.github.com/cub"
      url      = "https://github.com/NVlabs/cub/archive/1.6.4.zip"
  
      version('1.7.1', '028ac43922a4538596338ad5aef0f0c4')
      version('1.6.4', '924fc12c0efb17264c3ad2d611ed1c51')
      version('1.4.1', '74a36eb84e5b5f0bf54aa3df39f660b2')
  
      def install(self, spec, prefix):
          mkdirp(prefix.include)
          install_tree('cub', join_path(prefix.include, 'cub'))
  
subject: Add version 1.7.1 for cub. (#5164)