text: # Copyright 2013-2019 Lawrence Livermore National Security, LLC and other
  # Spack Project Developers. See the top-level COPYRIGHT file for details.
  #
  # SPDX-License-Identifier: (Apache-2.0 OR MIT)
  
  import os
  
  from spack import *
  
  
  class Elpa(AutotoolsPackage):
      """Eigenvalue solvers for Petaflop-Applications (ELPA)"""
  
      homepage = 'http://elpa.mpcdf.mpg.de/'
      url = 'http://elpa.mpcdf.mpg.de/elpa-2015.11.001.tar.gz'
  
      version('2018.11.001',
              sha256='cc27fe8ba46ce6e6faa8aea02c8c9983052f8e73a00cfea38abf7613cb1e1b16')
      version('2018.05.001.rc1', sha256='598c01da20600a4514ea4d503b93e977ac0367e797cab7a7c1b0e0e3e86490db')
      version('2017.11.001', sha256='59f99c3abe2190fac0db8a301d0b9581ee134f438669dbc92551a54f6f861820')
      version('2017.05.003', sha256='bccd49ce35a323bd734b17642aed8f2588fea4cc78ee8133d88554753bc3bf1b')
      version('2017.05.002', sha256='568b71024c094d667b5cbb23045ad197ed5434071152ac608dae490ace5eb0aa')
      version('2016.11.001.pre', sha256='69b67f0f6faaa2b3b5fd848127b632be32771636d2ad04583c5269d550956f92')
      version('2016.05.004', sha256='08c59dc9da458bab856f489d779152e5506e04f0d4b8d6dcf114ca5fbbe46c58')
      version('2016.05.003', sha256='c8da50c987351514e61491e14390cdea4bdbf5b09045261991876ed5b433fca4')
      version('2015.11.001', sha256='c0761a92a31c08a4009c9688c85fc3fc8fde9b6ce05e514c3e1587cf045e9eba')
  
      variant('openmp', default=False, description='Activates OpenMP support')
      variant('optflags', default=True, description='Build with optimization flags')
  
      depends_on('mpi')
      depends_on('blas')
      depends_on('lapack')
      depends_on('scalapack')
  
      def url_for_version(self, version):
          t = 'http://elpa.mpcdf.mpg.de/html/Releases/{0}/elpa-{0}.tar.gz'
          if version < Version('2016.05.003'):
              t = 'http://elpa.mpcdf.mpg.de/elpa-{0}.tar.gz'
          return t.format(str(version))
  
      # override default implementation which returns static lib
      @property
      def libs(self):
          libname = 'libelpa_openmp' if '+openmp' in self.spec else 'libelpa'
          return find_libraries(
              libname, root=self.prefix, shared=True, recursive=True
          )
  
      @property
      def headers(self):
          suffix = '_openmp' if self.spec.satisfies('+openmp') else ''
          incdir = os.path.join(
              self.spec.prefix.include,
              'elpa{suffix}-{version!s}'.format(
                  suffix=suffix, version=self.spec.version))
  
          hlist = find_all_headers(incdir)
          hlist.directories = [incdir]
          return hlist
  
      build_directory = 'spack-build'
  
      def setup_build_environment(self, env):
          spec = self.spec
  
          env.set('CC', spec['mpi'].mpicc)
          env.set('FC', spec['mpi'].mpifc)
          env.set('CXX', spec['mpi'].mpicxx)
  
          env.append_flags('LDFLAGS', spec['lapack'].libs.search_flags)
          env.append_flags('LIBS', spec['lapack'].libs.link_flags)
          env.set('SCALAPACK_LDFLAGS', spec['scalapack'].libs.joined())
  
      def configure_args(self):
          # TODO: set optimum flags for platform+compiler combo, see
          # https://github.com/hfp/xconfigure/tree/master/elpa
          # also see:
          # https://src.fedoraproject.org/cgit/rpms/elpa.git/
          # https://packages.qa.debian.org/e/elpa.html
          options = []
          # without -march=native there is configure error for 2017.05.02
          # Could not compile test program, try with --disable-sse, or
          # adjust the C compiler or CFLAGS
          if '+optflags' in self.spec:
              options.extend([
                  'FCFLAGS=-O2 -ffree-line-length-none',
                  'CFLAGS=-O2'
              ])
          if '+openmp' in self.spec:
              options.append('--enable-openmp')
          return options
  