mirror of
https://github.com/carbon-language/carbon-lang.git
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Chandler Carruth
83aeddb5ec
Also tidies up how we inject the project features so that they come last and can override anything earlier.
85 lines
3.2 KiB
Python
85 lines
3.2 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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"""Defines `cc_toolchain_config` features specific to the Carbon project."""
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load("@rules_cc//cc:action_names.bzl", "ACTION_NAMES")
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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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"feature_set",
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"flag_group",
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"flag_set",
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"with_feature_set",
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)
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load(
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":cc_toolchain_actions.bzl",
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"all_compile_actions",
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"preprocessor_compile_actions",
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)
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# An enabled feature that requires the `fastbuild` compilation. This is used
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# to toggle general features on by default, while allowing them to be
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# directly enabled and disabled more generally as desired.
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carbon_project_fastbuild_feature = feature(
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name = "enable_in_fastbuild",
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enabled = True,
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requires = [feature_set(["fastbuild"])],
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implies = [
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"asan",
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"asan_min_size",
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"minimal_optimization_flags",
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"minimal_debug_info_flags",
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],
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)
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def carbon_project_features(cache_key):
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return [carbon_project_fastbuild_feature, feature(
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name = "project_flags",
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enabled = True,
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flag_sets = [
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flag_set(
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actions = all_compile_actions,
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flag_groups = [flag_group(flags = [
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# Don't warn on external code as we can't
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# necessarily patch it easily. Note that these have
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# to be initial directories in the `#include` line.
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"--system-header-prefix=absl/",
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"--system-header-prefix=benchmark/",
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"--system-header-prefix=boost/",
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"--system-header-prefix=clang-tools-extra/",
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"--system-header-prefix=clang/",
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"--system-header-prefix=gmock/",
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"--system-header-prefix=gtest/",
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"--system-header-prefix=libfuzzer/",
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"--system-header-prefix=llvm/",
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"--system-header-prefix=re2/",
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"--system-header-prefix=tools/cpp/",
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"--system-header-prefix=tree_sitter/",
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])],
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),
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flag_set(
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actions = preprocessor_compile_actions,
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flag_groups = [flag_group(flags = [
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# Pass a cache key as a `-D` flag to avoid unintended Bazel
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# cache hits when the underlying toolchain changes.
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# TODO: We should consider replacing this by causing changes
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# to the installed toolchain to more reliably end up as part
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# of the action digest.
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"-DBAZEL_COMPILE_CACHE_KEY=\"%s\"" % cache_key,
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])],
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),
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flag_set(
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actions = [
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ACTION_NAMES.c_compile,
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ACTION_NAMES.cpp_compile,
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ACTION_NAMES.cpp_header_parsing,
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ACTION_NAMES.cpp_module_compile,
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],
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flag_groups = [flag_group(flags = ["-DHAVE_MALLCTL"])],
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with_features = [with_feature_set(["freebsd_target"])],
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),
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],
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)]
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