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##############################################################################
# Copyright (c) 2013-2018, 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 *
class AppleLibunwind(Package):
"""Placeholder package for Apple's analogue to non-GNU libunwind"""
homepage = "https://opensource.apple.com/source/libunwind/libunwind-35.3/"
provides('unwind')
# The 'conflicts' directive only accepts valid spack specs;
# platforms cannot be negated -- 'platform!=darwin' is not a valid
# spec -- so expressing a conflict for any platform that isn't
# Darwin must be expressed by listing a conflict with every
# platform that isn't Darwin/macOS
conflicts('platform=linux')
conflicts('platform=bgq')
conflicts('platform=cray')
# Override the fetcher method to throw a useful error message;
# avoids GitHub issue (#7061) in which the opengl placeholder
# package threw a generic, uninformative error during the `fetch`
# step,
@property
def fetcher(self):
msg = """This package is intended to be a placeholder for Apple's
system-provided, non-GNU-compatible libunwind library.
Add to your packages.yaml:
packages:
apple-libunwind:
paths:
apple-libunwind@35.3: /usr
buildable: False
"""
raise InstallError(msg)
def install(self, spec, prefix):
pass
@property
def libs(self):
"""Export the Apple libunwind library. The Apple libunwind library
cannot be linked to directly using an absolute path; doing so
will cause the linker to throw an error 'cannot link directly
with /usr/lib/system/libunwind.dylib' and the linker will
suggest linking with System.framework instead. Linking to this
framework is equivalent to linking with libSystem.dylib, which
can be confirmed on a macOS system by executing at a terminal
the command `ls -l
/System/Library/Frameworks/System.Framework` -- the file
"System" is a symlink to `/usr/lib/libSystem.B.dylib`, and
`/usr/lib/libSystem.dylib` also symlinks to this file.
Running `otool -L /usr/lib/libSystem.dylib` confirms that
it will link dynamically to `/usr/lib/system/libunwind.dylib`.
"""
libs = find_libraries('libSystem',
self.prefix.lib,
shared=True, recursive=False)
if libs:
return libs
return None
@property
def headers(self):
""" Export the Apple libunwind header
"""
hdrs = HeaderList(find(self.prefix.include, 'libunwind.h',
recursive=False))
return hdrs or None
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