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##############################################################################
# Copyright (c) 2013-2017, 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 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 sys


class Symengine(CMakePackage):
    """SymEngine is a fast symbolic manipulation library, written in C++."""

    homepage = "https://github.com/symengine/symengine"
    url      = "https://github.com/symengine/symengine/archive/v0.2.0.tar.gz"

    version('0.3.0', 'e61d7513cca4963cd062616891de54c6')
    version('0.2.0', '45401561add36a13c1f0b0c5f8d7422d')
    version('0.1.0', '41ad7daed61fc5a77c285eb6c7303425')
    version('develop', git='https://github.com/symengine/symengine.git')

    variant('boostmp',      default=False,
            description='Compile with Boost multi-precision integer library')
    variant('flint',        default=False,
            description='Compile with Flint integer library')
    variant('llvm',         default=False,
            description='Compile with LLVM JIT compiler support')
    variant('mpc',          default=True,
            description='Compile with MPC library')
    variant('mpfr',         default=True,
            description='Compile with MPFR library')
    variant('openmp',       default=False,
            description='Enable OpenMP support')
    variant('piranha',      default=False,
            description='Compile with Piranha integer library')
    variant('thread_safe',  default=True,
            description='Enable thread safety option')
    variant('shared',       default=True,
            description='Enables the build of shared libraries')
    variant('build_type', default='Release',
            description='The build type to build',
            values=('Debug', 'Release'))

    # NOTE: mpir is a drop-in replacement for gmp
    # NOTE: [mpc,mpfr,flint,piranha] could also be built against mpir
    depends_on('boost',    when='+boostmp')
    depends_on('gmp',      when='~boostmp')
    depends_on('llvm',     when='+llvm')
    depends_on('mpc',      when='+mpc~boostmp')
    depends_on('mpfr',     when='+mpfr~boostmp')
    depends_on('flint',    when='+flint~boostmp')
    depends_on('piranha',  when='+piranha~flint~boostmp')

    def cmake_args(self):
        spec = self.spec
        options = []

        # See https://github.com/symengine/symengine/blob/master/README.md
        # for build options
        options.extend([
            '-DWITH_SYMENGINE_RCP:BOOL=ON',
            '-DWITH_SYMENGINE_THREAD_SAFE:BOOL=%s' % (
                'ON' if ('+thread_safe' or '+openmp') in spec else 'OFF'),
            '-DBUILD_TESTS:BOOL=%s' % (
                'ON' if self.run_tests else 'OFF'),
            '-DBUILD_BENCHMARKS:BOOL=ON',
            '-DWITH_LLVM:BOOL=%s' % (
                'ON' if '+llvm' in spec else 'OFF'),
            '-DWITH_OPENMP:BOOL=%s' % (
                'ON' if '+openmp' in spec else 'OFF'),
            '-DBUILD_SHARED_LIBS:BOOL=%s' % (
                'ON' if '+shared' in spec else 'OFF'),
        ])

        if sys.platform == 'darwin':
            options.extend([
                '-DCMAKE_INSTALL_RPATH_USE_LINK_PATH:BOOL=on'
            ])

        if '+boostmp' in spec:
            options.extend([
                '-DINTEGER_CLASS:STRING=boostmp',
                '-DBoost_INCLUDE_DIR=%s' % spec['boost'].prefix.include,
                '-DWITH_MPC:BOOL=OFF',
                '-DWITH_MPFR:BOOL=OFF',
            ])
        else:
            options.extend([
                '-DWITH_MPC:BOOL=%s' % (
                    'ON' if '+mpc' in spec else 'OFF'),
                '-DWITH_MPFR:BOOL=%s' % (
                    'ON' if '+mpfr' in spec else 'OFF'),
            ])
            if '+flint' in spec:
                options.extend([
                    '-DWITH_FLINT:BOOL=ON',
                    '-DINTEGER_CLASS:STRING=flint'
                ])
            elif '+piranha' in spec:
                options.extend([
                    '-DWITH_PIRANHA:BOOL=ON',
                    '-DINTEGER_CLASS:STRING=piranha'
                ])
            else:
                options.extend([
                    '-DINTEGER_CLASS:STRING=gmp'
                ])

        return options