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https://github.com/carbon-language/carbon-lang.git
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Chandler Carruth
94d9bff541
This requires re-working our config features to be usable in feature-level `requires` clauses in addition to `with_feature_set` by always including all of the features, but controlling whether the features are enabled or disabled based on the target. This is a little more verbose in the config features, but lets us use them more widely and is a bit more principled.
55 lines
1.4 KiB
Python
55 lines
1.4 KiB
Python
# Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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# Exceptions. See /LICENSE for license information.
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# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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"""Configuration features for other features in a `cc_toolchain_config`.
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These features are designed to be used by other features in a
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`cc_toolchain_config` that need to configure their behavior in some way. This
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can be configuration based on either the target or host of the build, and along
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multiple dimensions of each.
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"""
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load(
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"@rules_cc//cc:cc_toolchain_config_lib.bzl",
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"feature",
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)
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os_names = [
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"freebsd",
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"linux",
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"macos",
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"windows",
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]
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def target_os_features(target_os):
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if target_os not in os_names:
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fail("Unsupported target OS: %s" % target_os)
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return [
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feature(name = os_name + "_target", enabled = os_name == target_os)
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for os_name in os_names
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]
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cpu_names = [
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"aarch64",
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"x86_64",
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]
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# Also support canonicalizing different spellings of CPUs to one of the above
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# names.
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cpu_canonical_name_map = {
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"aarch64": "aarch64",
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"arm64": "aarch64",
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"x86_64": "x86_64",
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}
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def target_cpu_features(target_cpu):
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if target_cpu not in cpu_canonical_name_map:
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fail("Unsupported target CPU: %s" % target_cpu)
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target_cpu = cpu_canonical_name_map[target_cpu]
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return [
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feature(name = cpu_name + "_target", enabled = cpu_name == target_cpu)
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for cpu_name in cpu_names
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]
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