# Copyright 2013-2022 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)

from spack import *


class Libffi(AutotoolsPackage):
    """The libffi library provides a portable, high level programming
    interface to various calling conventions. This allows a programmer
    to call any function specified by a call interface description at
    run time."""
    homepage = "https://sourceware.org/libffi/"
    url      = "https://github.com/libffi/libffi/releases/download/v3.4.2/libffi-3.4.2.tar.gz"

    version('3.4.2', sha256='540fb721619a6aba3bdeef7d940d8e9e0e6d2c193595bc243241b77ff9e93620')
    version('3.3',   url='https://sourceware.org/pub/libffi/libffi-3.3.tar.gz', sha256='72fba7922703ddfa7a028d513ac15a85c8d54c8d67f55fa5a4802885dc652056')
    version('3.2.1', url='https://sourceware.org/pub/libffi/libffi-3.2.1.tar.gz', sha256='d06ebb8e1d9a22d19e38d63fdb83954253f39bedc5d46232a05645685722ca37')

    patch('clang-powerpc-3.2.1.patch', when='@3.2.1%clang platform=linux')
    # ref.: https://github.com/libffi/libffi/pull/561
    patch('powerpc-3.3.patch', when='@3.3')

    @property
    def headers(self):
        # The headers are probably in self.prefix.lib but we search everywhere
        return find_headers('ffi', self.prefix, recursive=True)

    def configure_args(self):
        args = []
        if self.spec.version >= Version('3.3'):
            # Spack adds its own target flags, so tell libffi not to
            # second-guess us
            args.append('--without-gcc-arch')
        # At the moment, build scripts accept 'aarch64-apple-darwin'
        # but not 'arm64-apple-darwin'.
        # See: https://github.com/libffi/libffi/issues/571
        if self.spec.satisfies('platform=darwin target=aarch64:'):
            args.append('--build=aarch64-apple-darwin')
        return args
