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 Relion(CMakePackage):
      """RELION (for REgularised LIkelihood OptimisatioN, pronounce rely-on) is a
      stand-alone computer program that employs an empirical Bayesian approach to
      refinement of (multiple) 3D reconstructions or 2D class averages in
      electron cryo-microscopy (cryo-EM)."""
  
      homepage = "http://http://www2.mrc-lmb.cam.ac.uk/relion"
      url      = "https://github.com/3dem/relion/archive/2.0.3.tar.gz"
  
      version('2.0.3', 'c61be5ef00848806278b341f43893f5d')
  
      variant('gui', default=True, description="build the gui")
      variant('cuda', default=False, description="enable compute on gpu")
      variant('double', default=False, description="double precision (cpu) code")
      variant('double-gpu', default=False, description="double precision (gpu) code")
  
      depends_on('mpi')
      depends_on('fftw+float+double')
      depends_on('fltk', when='+gui')
      depends_on('cuda', when='+cuda')
  
      def cmake_args(self):
          args = [
              '-DCMAKE_C_FLAGS=-g',
              '-DCMAKE_CXX_FLAGS=-g',
              '-DGUI=%s' % ('+gui' in self.spec),
              '-DDoublePrec_CPU=%s' % ('+double' in self.spec),
              '-DDoublePrec_GPU=%s' % ('+double-gpu' in self.spec),
          ]
          if '+cuda' in self.spec:
              args += [
                  '-DCUDA=on',
                  '-DCUFFT=on',
              ]
          return args
  
subject: add relion package (#4020)