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 Protobuf(AutotoolsPackage):
      """Google's data interchange format."""
  
      homepage = "https://developers.google.com/protocol-buffers"
      url      = "https://github.com/google/protobuf/archive/v3.2.0.tar.gz"
  
      version('3.2.0', '61d899b8369781f6dd1e62370813392d')
      version('3.1.0', '14a532a7538551d5def317bfca41dace')
      version('3.0.2', '845b39e4b7681a2ddfd8c7f528299fbb')
      version('2.5.0', '9c21577a03adc1879aba5b52d06e25cf')
  
      depends_on('automake', type='build')
      depends_on('autoconf', type='build')
      depends_on('libtool',  type='build')
      depends_on('m4',       type='build')
  
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 Protobuf(AutotoolsPackage):
      """Google's data interchange format."""
  
      homepage = "https://developers.google.com/protocol-buffers"
      url      = "https://github.com/google/protobuf/archive/v3.2.0.tar.gz"
  
      version('3.2.0', '61d899b8369781f6dd1e62370813392d')
      version('3.1.0', '14a532a7538551d5def317bfca41dace')
      version('3.0.2', '845b39e4b7681a2ddfd8c7f528299fbb')
      version('2.5.0', '9c21577a03adc1879aba5b52d06e25cf')
  
      depends_on('automake', type='build')
      depends_on('autoconf', type='build')
      depends_on('libtool',  type='build')
      depends_on('m4',       type='build')
  
      variant('shared', default=True, description='Build shared libraries.')
  
      def configure_args(self):
          if '+shared' in self.spec:
              return ['--enable-shared=yes',
                      '--enable-static=no']
          else:
              return ['--enable-shared=no',
                      '--enable-static=yes',
                      '--with-pic=yes']
  
subject: Add the 'shared' variant for protobuf. (#3703)