old_contents: ##############################################################################
  # Copyright (c) 2013-2018, 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 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 Xsbench(MakefilePackage):
      """XSBench is a mini-app representing a key computational
         kernel of the Monte Carlo neutronics application OpenMC.
         A full explanation of the theory and purpose of XSBench
         is provided in docs/XSBench_Theory.pdf."""
  
      homepage = "https://github.com/ANL-CESAR/XSBench/"
      url = "https://github.com/ANL-CESAR/XSBench/archive/v13.tar.gz"
  
      tags = ['proxy-app', 'ecp-proxy-app']
  
      version('18', sha256='a9a544eeacd1be8d687080d2df4eeb701c04eda31d3806e7c3ea1ff36c26f4b0')
      version('14', '94d5d28eb031fd4ef35507c9c1862169')
      version('13', '72a92232d2f5777fb52f5ea4082aff37')
  
      variant('mpi', default=False, description='Build with MPI support')
  
      depends_on('mpi', when='+mpi')
  
      build_directory = 'src'
  
      @property
      def build_targets(self):
  
          targets = []
  
          cflags = '-std=gnu99'
          if '+mpi' in self.spec:
              targets.append('CC={0}'.format(self.spec['mpi'].mpicc))
  
          cflags += ' ' + self.compiler.openmp_flag
          targets.append('CFLAGS={0}'.format(cflags))
          targets.append('LDFLAGS=-lm')
  
          return targets
  
      def install(self, spec, prefix):
          mkdir(prefix.bin)
          install('src/XSBench', prefix.bin)
  
new_contents: ##############################################################################
  # Copyright (c) 2013-2018, 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 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 Xsbench(MakefilePackage):
      """XSBench is a mini-app representing a key computational
         kernel of the Monte Carlo neutronics application OpenMC.
         A full explanation of the theory and purpose of XSBench
         is provided in docs/XSBench_Theory.pdf."""
  
      homepage = "https://github.com/ANL-CESAR/XSBench/"
      url = "https://github.com/ANL-CESAR/XSBench/archive/v13.tar.gz"
  
      tags = ['proxy-app', 'ecp-proxy-app']
  
      version('18', sha256='a9a544eeacd1be8d687080d2df4eeb701c04eda31d3806e7c3ea1ff36c26f4b0')
      version('14', '94d5d28eb031fd4ef35507c9c1862169')
      version('13', '72a92232d2f5777fb52f5ea4082aff37')
  
      variant('mpi', default=True, description='Build with MPI support')
      variant('openmp', default=True, description='Build with OpenMP support')
  
      depends_on('mpi', when='+mpi')
  
      build_directory = 'src'
  
      @property
      def build_targets(self):
  
          targets = []
  
          cflags = '-std=gnu99'
          if '+mpi' in self.spec:
              targets.append('CC={0}'.format(self.spec['mpi'].mpicc))
          else:
              targets.append('CC={0}'.format(self.compiler.cxx))
  
          if '+openmp' in self.spec:
              cflags += ' ' + self.compiler.openmp_flag
          targets.append('CFLAGS={0}'.format(cflags))
          targets.append('LDFLAGS=-lm')
  
          return targets
  
      def install(self, spec, prefix):
          mkdir(prefix.bin)
          install('src/XSBench', prefix.bin)
  
subject: fix build errors, make mpi variant default and add openmp variant (#9364)