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##############################################################################
# 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 NOTICE and LICENSE files 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 *
import os
import sys


class Hypre(Package):
    """Hypre is a library of high performance preconditioners that
       features parallel multigrid methods for both structured and
       unstructured grid problems."""

    homepage = "http://computation.llnl.gov/project/linear_solvers/software.php"
    url      = "http://computation.llnl.gov/project/linear_solvers/download/hypre-2.10.0b.tar.gz"

    version('develop', git='https://github.com/LLNL/hypre', tag='master')
    version('xsdk-0.2.0', git='https://github.com/LLNL/hypre', tag='xsdk-0.2.0')
    version('2.11.2', 'd507943a1a3ce5681c3308e2f3a6dd34')
    version('2.11.1', '3f02ef8fd679239a6723f60b7f796519')
    version('2.10.1', 'dc048c4cabb3cd549af72591474ad674')
    version('2.10.0b', '768be38793a35bb5d055905b271f5b8e')

    # hypre does not know how to build shared libraries on Darwin
    variant('shared', default=(sys.platform != 'darwin'),
            description="Build shared library (disables static library)")
    # SuperluDist have conflicting headers with those in Hypre
    variant('internal-superlu', default=True,
            description="Use internal Superlu routines")
    variant('int64', default=False,
            description="Use 64bit integers")

    # Patch to add ppc64le in config.guess
    patch('ibm-ppc64le.patch', when='@:2.11.1')

    depends_on("mpi")
    depends_on("blas")
    depends_on("lapack")

    def install(self, spec, prefix):
        os.environ['CC'] = spec['mpi'].mpicc
        os.environ['CXX'] = spec['mpi'].mpicxx
        os.environ['F77'] = spec['mpi'].mpif77

        # Note: --with-(lapack|blas)_libs= needs space separated list of names
        lapack = spec['lapack'].libs
        blas = spec['blas'].libs

        configure_args = [
            '--prefix=%s' % prefix,
            '--with-lapack-libs=%s' % ' '.join(lapack.names),
            '--with-lapack-lib-dirs=%s' % ' '.join(lapack.directories),
            '--with-blas-libs=%s' % ' '.join(blas.names),
            '--with-blas-lib-dirs=%s' % ' '.join(blas.directories)
        ]

        if '+int64' in self.spec:
            configure_args.append('--enable-bigint')

        if '+shared' in self.spec:
            configure_args.append("--enable-shared")

        if '~internal-superlu' in self.spec:
            configure_args.append("--without-superlu")
            # MLI and FEI do not build without superlu on Linux
            configure_args.append("--without-mli")
            configure_args.append("--without-fei")

        # Hypre's source is staged under ./src so we'll have to manually
        # cd into it.
        with working_dir("src"):
            configure(*configure_args)

            make()
            if self.run_tests:
                make("check")
                make("test")
                Executable(join_path('test', 'ij'))()
                sstruct = Executable(join_path('test', 'struct'))
                sstruct()
                sstruct('-in', 'test/sstruct.in.default', '-solver', '40',
                        '-rhsone')
            make("install")