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# Copyright 2013-2024 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 platform as py_platform
import archspec.cpu
import spack.target
from spack.operating_systems.mac_os import MacOs
from spack.version import Version
from ._platform import Platform
class Darwin(Platform):
priority = 89
binary_formats = ["macho"]
def __init__(self):
super().__init__("darwin")
for name in archspec.cpu.TARGETS:
self.add_target(name, spack.target.Target(name))
self.default = archspec.cpu.host().name
self.front_end = self.default
self.back_end = self.default
mac_os = MacOs()
self.default_os = str(mac_os)
self.front_os = str(mac_os)
self.back_os = str(mac_os)
self.add_operating_system(str(mac_os), mac_os)
@classmethod
def detect(cls):
return "darwin" in py_platform.system().lower()
def setup_platform_environment(self, pkg, env):
"""Specify deployment target based on target OS version.
The ``MACOSX_DEPLOYMENT_TARGET`` environment variable provides a
default ``-mmacosx-version-min`` argument for GCC and Clang compilers,
as well as the default value of ``CMAKE_OSX_DEPLOYMENT_TARGET`` for
CMake-based build systems. The default value for the deployment target
is usually the major version (11, 10.16, ...) for CMake and Clang, but
some versions of GCC specify a minor component as well (11.3), leading
to numerous link warnings about inconsistent or incompatible target
versions. Setting the environment variable ensures consistent versions
for an install toolchain target, even when the host macOS version
changes.
TODO: it may be necessary to add SYSTEM_VERSION_COMPAT for older
versions of the macosx developer tools; see
https://github.com/spack/spack/pull/26290 for discussion.
"""
os = self.operating_sys[pkg.spec.os]
version = Version(os.version)
if len(version) == 1:
# Version has only one component: add a minor version to prevent
# potential errors with `ld`,
# which fails with `-macosx_version_min 11`
# but succeeds with `-macosx_version_min 11.0`.
# Most compilers seem to perform this translation automatically,
# but older GCC does not.
version = str(version) + ".0"
env.set("MACOSX_DEPLOYMENT_TARGET", str(version))
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