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# Copyright 2013-2021 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 sys

from spack import *


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

    homepage = "https://symengine.org"
    url      = "https://github.com/symengine/symengine/archive/v0.2.0.tar.gz"
    git      = "https://github.com/symengine/symengine.git"
    maintainers = ['HaoZeke']

    version('master', branch='master')
    version('0.7.0', sha256='8b865bb72b71539d9cd2488a0468c6c3ea90cc606062a7880c3ff5af6abd74b1')
    version('0.6.0', sha256='4d2caa86c03eaaa8ed004084d02f87b5c51b6229f8ba70d161227e22d6302f0a')
    version('0.5.0', sha256='5d02002f00d16a0928d1056e6ecb8f34fd59f3bfd8ed0009a55700334dbae29b')
    version('0.4.0', sha256='dd755901a9e2a49e53ba3bbe3f565f94265af05299e57a7b592186dd35916a1b')
    version('0.3.0', sha256='591463cb9e741d59f6dfd39a7943e3865d3afe9eac47d1a9cbf5ca74b9c49476')
    version('0.2.0', sha256='64d050b0b9decd12bf4ea3b7d18d3904dd7cb8baaae9fbac1b8068e3c59709be')
    version('0.1.0', sha256='daba3ba0ae91983a772f66bf755b1953c354fe6dc353588b23705d9a79b011fc')

    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'),
            self.define('BUILD_TESTS', self.run_tests),
            '-DBUILD_BENCHMARKS:BOOL=ON',
            self.define_from_variant('WITH_LLVM', 'llvm'),
            self.define_from_variant('WITH_OPENMP', 'openmp'),
            self.define_from_variant('BUILD_SHARED_LIBS', 'shared'),
        ])

        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([
                self.define_from_variant('WITH_MPC', 'mpc'),
                self.define_from_variant('WITH_MPFR', 'mpfr'),
            ])
            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