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# Copyright 2013-2019 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 *
import sys
class Expat(AutotoolsPackage):
"""Expat is an XML parser library written in C."""
homepage = "https://libexpat.github.io/"
url = "https://github.com/libexpat/libexpat/releases/download/R_2_2_2/expat-2.2.2.tar.bz2"
# Version 2.2.2 introduced a requirement for a high quality
# entropy source. "Older" linux systems (aka CentOS 7) do not
# support get_random so we'll provide a high quality source via
# libbsd.
# There's no need for it in earlier versions, so 'conflict' if
# someone's asking for an older version and also libbsd.
# In order to install an older version, you'll need to add
# `~libbsd`.
variant('libbsd', default=sys.platform != 'darwin',
description="Use libbsd (for high quality randomness)")
depends_on('libbsd', when="@2.2.1:+libbsd")
version('2.2.5', '789e297f547980fc9ecc036f9a070d49')
version('2.2.2', '1ede9a41223c78528b8c5d23e69a2667')
version('2.2.0', '2f47841c829facb346eb6e3fab5212e2')
def url_for_version(self, version):
url = 'https://github.com/libexpat/libexpat/releases/download/R_{0}/expat-{1}.tar.bz2'
return url.format(version.underscored, version.dotted)
def configure_args(self):
spec = self.spec
args = []
if '+libbsd' in spec and '@2.2.1:' in spec:
args = ['--with-libbsd']
return args
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