mumps.rb

require 'formula'

class Mumps < Formula
  homepage 'http://mumps.enseeiht.fr'
  url 'http://mumps.enseeiht.fr/MUMPS_4.10.0.tar.gz'
  mirror 'http://graal.ens-lyon.fr/MUMPS/MUMPS_4.10.0.tar.gz'
  sha1 '904b1d816272d99f1f53913cbd4789a5be1838f7'

  depends_on 'scotch5' => :optional     # Scotch 6 support currently broken.
  depends_on 'openblas' => :optional

  depends_on :mpi => [:cc, :cxx, :f90, :recommended]
  if build.with? 'mpi'
    depends_on 'scalapack' => (build.with? 'openblas') ? ['with-openblas'] : :build
  end
  depends_on 'metis4' => :optional if build.without? :mpi

  depends_on :fortran

  def install
    make_args = ["LIBEXT=.dylib",
                 "AR=$(FL) -shared -Wl,-install_name -Wl,#{lib}/$(notdir $@) -undefined dynamic_lookup -o ",  # Must have a trailing whitespace!
                 "RANLIB=echo"]
    orderingsf = "-Dpord"

    makefile = (build.with? :mpi) ? "Makefile.gfortran.PAR" : "Makefile.gfortran.SEQ"
    cp "Make.inc/" + makefile, "Makefile.inc"

    if build.with? 'scotch5'
      make_args += ["SCOTCHDIR=#{Formula['scotch5'].prefix}",
                    "ISCOTCH=-I#{Formula["scotch5"].include}"]

      if build.with? :mpi
        make_args << "LSCOTCH=-L$(SCOTCHDIR)/lib -lptesmumps -lptscotch -lptscotcherr"
        orderingsf << " -Dptscotch"
      else
        make_args << "LSCOTCH=-L$(SCOTCHDIR) -lesmumps -lscotch -lscotcherr"
        orderingsf << " -Dscotch"
      end
    end

    if build.with? "metis4"
      make_args += ["LMETISDIR=#{Formula["metis4"].lib}",
                    "IMETIS=#{Formula["metis4"].include}",
                    "LMETIS=-L#{Formula["metis4"].lib} -lmetis"]
      orderingsf << ' -Dmetis'
    end

    make_args << "ORDERINGSF=#{orderingsf}"

    if build.with? :mpi
      make_args += ["CC=#{ENV['MPICC']} -fPIC",
                    "FC=#{ENV['MPIFC']} -fPIC",
                    "FL=#{ENV['MPIFC']} -fPIC",
                    "SCALAP=-L#{Formula["scalapack"].lib} -lscalapack",
                    "INCPAR=-I#{Formula["open-mpi"].include}",
                    "LIBPAR=$(SCALAP) -L#{Formula["open-mpi"].lib} -lmpi -lmpi_mpifh"]
    else
      make_args += ["CC=#{ENV['CC']} -fPIC",
                    "FC=#{ENV['FC']} -fPIC",
                    "FL=#{ENV['FC']} -fPIC"]
    end

    if build.with? 'openblas'
      make_args << "LIBBLAS=-L#{Formula["openblas"].lib} -lopenblas"
    else
      make_args << "LIBBLAS=-lblas -llapack"
    end

    ENV.deparallelize  # Build fails in parallel on Mavericks.
    system "make", "all", *make_args

    lib.install Dir['lib/*']

    if build.with? :mpi
      include.install Dir['include/*']
    else
      lib.install 'libseq/libmpiseq.dylib'
      libexec.install 'include'
      include.install_symlink Dir[libexec / 'include/*']
      # The following .h files may conflict with others related to MPI
      # in /usr/local/include. Do not symlink them.
      (libexec / 'include').install Dir['libseq/*.h']
    end

    (share + 'doc').install Dir['doc/*.pdf']
    (share + 'examples').install Dir['examples/*[^.o]']
  end

  def caveats
    s = ''
    if build.without? :mpi
      s += <<-EOS.undent
      You built a sequential MUMPS library.
      Please add #{libexec}/include to the include path
      when building software that depends on MUMPS.
      EOS
    end
    return s
  end

  def test
    cmd = (Tab.for_formula(self).used_options.include? 'without-mpi') ? '' : 'mpirun -np 2'
    system "#{cmd} #{share}/examples/ssimpletest < #{share}/examples/input_simpletest_real"
    system "#{cmd} #{share}/examples/dsimpletest < #{share}/examples/input_simpletest_real"
    system "#{cmd} #{share}/examples/csimpletest < #{share}/examples/input_simpletest_cmplx"
    system "#{cmd} #{share}/examples/zsimpletest < #{share}/examples/input_simpletest_cmplx"
    system "#{cmd} #{share}/examples/c_example"
    ohai "Test results are in ~/Library/Logs/Homebrew/mumps"
  end
end