mirror of
https://github.com/carbon-language/carbon-lang.git
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Chandler Carruth
a1a9c02cdc
Rather than defining our own action groups, work to re-use the `rules_cc` ones, as they are (much) more comprehensive. Also, completely eliminate the `codegen` action group as it was not well used. For example, `-march` flags and `-O` flags change the preprocessor macros defined. There isn't a really great "codegen" heuristic, so just pass those flags to all compiles which is simpler anyways. I'm tempted to do the same with preprocessor actions, but maybe it makes sense to have that one stay separate. Assisted-by: Antigravity with Gemini
130 lines
3.8 KiB
Python
130 lines
3.8 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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"""Definitions used for the base features of a `cc_toolchain_config`."""
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load("@rules_cc//cc:action_names.bzl", "ACTION_NAMES", "ACTION_NAME_GROUPS")
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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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)
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# Declare features that are used by Bazel to model specific build modes.
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dbg_feature = feature(name = "dbg")
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fastbuild_feature = feature(name = "fastbuild")
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host_feature = feature(name = "host")
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opt_feature = feature(name = "opt")
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# Declare features that control enabling and disabling Bazel logic.
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no_legacy_features_feature = feature(name = "no_legacy_features")
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supports_pic_feature = feature(name = "supports_pic", enabled = True)
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supports_dynamic_linker_feature = feature(
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name = "supports_dynamic_linker",
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enabled = True,
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requires = [feature_set(["linux_target"])],
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)
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supports_start_end_lib_feature = feature(
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name = "supports_start_end_lib",
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enabled = True,
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requires = [feature_set(["linux_target"])],
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)
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user_flags_feature = feature(
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name = "user_flags",
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enabled = True,
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flag_sets = [
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flag_set(
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actions = ACTION_NAME_GROUPS.all_cc_compile_actions,
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flag_groups = [flag_group(
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expand_if_available = "user_compile_flags",
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flags = ["%{user_compile_flags}"],
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iterate_over = "user_compile_flags",
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)],
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),
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flag_set(
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actions = ACTION_NAME_GROUPS.all_cc_link_actions,
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flag_groups = [flag_group(
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expand_if_available = "user_link_flags",
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flags = ["%{user_link_flags}"],
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iterate_over = "user_link_flags",
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)],
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),
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],
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)
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# TODO: It's not clear this is the right location for these flags, and it is a
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# little awkward.
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output_flags_feature = feature(
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name = "output_flags",
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enabled = True,
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flag_sets = [
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flag_set(
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actions = ACTION_NAME_GROUPS.all_cc_compile_actions,
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flag_groups = [
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# For compile actions we have a single source and so put it at
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# the end next to the output.
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flag_group(
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expand_if_available = "source_file",
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flags = ["%{source_file}"],
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),
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flag_group(
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expand_if_available = "output_file",
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flags = ["-o", "%{output_file}"],
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),
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],
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),
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flag_set(
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actions = ACTION_NAME_GROUPS.all_cc_link_actions,
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flag_groups = [flag_group(
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expand_if_available = "output_execpath",
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flags = ["-o", "%{output_execpath}"],
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)],
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),
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],
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)
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strip_feature = feature(
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name = "strip_flags",
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enabled = True,
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flag_sets = [flag_set(
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actions = [ACTION_NAMES.strip],
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flag_groups = [
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flag_group(
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flags = ["-S"],
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),
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flag_group(
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flags = ["-p"],
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),
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flag_group(
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expand_if_available = "output_file",
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flags = ["-o", "%{output_file}"],
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),
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flag_group(
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iterate_over = "stripopts",
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flags = ["%{stripopts}"],
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),
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flag_group(
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expand_if_available = "input_file",
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flags = ["%{input_file}"],
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),
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],
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)],
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)
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base_features = [
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dbg_feature,
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fastbuild_feature,
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host_feature,
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no_legacy_features_feature,
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opt_feature,
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strip_feature,
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supports_pic_feature,
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supports_dynamic_linker_feature,
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supports_start_end_lib_feature,
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]
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