mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-10-05 21:51:12 +01:00
Chandler Carruth
cd605e5ad4
This lets us use a single undconditional feature for linking with flag sets that are enabled based on the underlying OS. While here, tidy up the feature names a bit. The diff here may look really bad without aggressive whitespace ignoring, but none of the contents of the two flag sets changed -- they've just be indented more and placed into a single list.
289 lines
13 KiB
Python
289 lines
13 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 of linking related features used in a `cc_toolchain_config`."""
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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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"flag_group",
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"flag_set",
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"variable_with_value",
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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_link_actions",
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)
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link_libraries_feature = feature(
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name = "link_libraries",
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enabled = True,
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flag_sets = [
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flag_set(
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actions = all_link_actions,
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flag_groups = [
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flag_group(
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expand_if_available = "linkstamp_paths",
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flags = ["%{linkstamp_paths}"],
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iterate_over = "linkstamp_paths",
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),
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flag_group(
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expand_if_available = "libraries_to_link",
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flag_groups = [
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "object_file_group",
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),
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flags = ["-Wl,--start-lib"],
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),
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flag_group(
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expand_if_true = "libraries_to_link.is_whole_archive",
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flags = ["-Wl,-whole-archive"],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "object_file_group",
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),
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flags = ["%{libraries_to_link.object_files}"],
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iterate_over = "libraries_to_link.object_files",
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "object_file",
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),
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flags = ["%{libraries_to_link.name}"],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "interface_library",
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),
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flags = ["%{libraries_to_link.name}"],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "static_library",
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),
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flags = ["%{libraries_to_link.name}"],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "dynamic_library",
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),
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flags = ["-l%{libraries_to_link.name}"],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "versioned_dynamic_library",
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),
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flags = ["-l:%{libraries_to_link.name}"],
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),
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flag_group(
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expand_if_true = "libraries_to_link.is_whole_archive",
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flags = ["-Wl,-no-whole-archive"],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "object_file_group",
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),
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flags = ["-Wl,--end-lib"],
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),
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],
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iterate_over = "libraries_to_link",
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),
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# Note that the params file comes at the end, after the
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# libraries to link above.
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flag_group(
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expand_if_available = "linker_param_file",
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flags = ["@%{linker_param_file}"],
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),
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],
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with_features = [with_feature_set(not_features = ["macos_target"])],
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),
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flag_set(
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actions = all_link_actions,
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flag_groups = [
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flag_group(
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expand_if_available = "linkstamp_paths",
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flags = ["%{linkstamp_paths}"],
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iterate_over = "linkstamp_paths",
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),
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flag_group(
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expand_if_available = "libraries_to_link",
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flag_groups = [
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "object_file_group",
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),
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flags = ["-Wl,--start-lib"],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "object_file_group",
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),
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flag_groups = [
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flag_group(
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expand_if_false = "libraries_to_link.is_whole_archive",
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flags = ["%{libraries_to_link.object_files}"],
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),
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flag_group(
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expand_if_true = "libraries_to_link.is_whole_archive",
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flags = ["-Wl,-force_load,%{libraries_to_link.object_files}"],
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),
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],
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iterate_over = "libraries_to_link.object_files",
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "object_file",
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),
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flag_groups = [
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flag_group(
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expand_if_false = "libraries_to_link.is_whole_archive",
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flags = ["%{libraries_to_link.name}"],
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),
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flag_group(
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expand_if_true = "libraries_to_link.is_whole_archive",
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flags = ["-Wl,-force_load,%{libraries_to_link.name}"],
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),
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],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "interface_library",
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),
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flag_groups = [
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flag_group(
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expand_if_false = "libraries_to_link.is_whole_archive",
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flags = ["%{libraries_to_link.name}"],
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),
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flag_group(
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expand_if_true = "libraries_to_link.is_whole_archive",
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flags = ["-Wl,-force_load,%{libraries_to_link.name}"],
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),
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],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "static_library",
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),
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flag_groups = [
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flag_group(
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expand_if_false = "libraries_to_link.is_whole_archive",
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flags = ["%{libraries_to_link.name}"],
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),
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flag_group(
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expand_if_true = "libraries_to_link.is_whole_archive",
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flags = ["-Wl,-force_load,%{libraries_to_link.name}"],
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),
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],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "dynamic_library",
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),
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flags = ["-l%{libraries_to_link.name}"],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "versioned_dynamic_library",
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),
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flags = ["-l:%{libraries_to_link.name}"],
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),
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flag_group(
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expand_if_true = "libraries_to_link.is_whole_archive",
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flag_groups = [
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flag_group(
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expand_if_false = "macos_flags",
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flags = ["-Wl,-no-whole-archive"],
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),
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],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "object_file_group",
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),
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flags = ["-Wl,--end-lib"],
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),
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],
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iterate_over = "libraries_to_link",
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),
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# Note that the params file comes at the end, after the
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# libraries to link above.
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flag_group(
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expand_if_available = "linker_param_file",
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flags = ["@%{linker_param_file}"],
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),
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],
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with_features = [with_feature_set(["macos_target"])],
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),
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],
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)
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# Archive actions have an entirely independent set of flags and don't
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# interact with either compiler or link actions.
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archiving_feature = feature(
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name = "archiving",
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enabled = True,
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flag_sets = [flag_set(
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actions = [ACTION_NAMES.cpp_link_static_library],
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flag_groups = [
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flag_group(flags = ["rcsD"]),
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flag_group(
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expand_if_available = "output_execpath",
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flags = ["%{output_execpath}"],
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),
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flag_group(
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expand_if_available = "libraries_to_link",
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flag_groups = [
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "object_file",
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),
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flags = ["%{libraries_to_link.name}"],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "object_file_group",
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),
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flags = ["%{libraries_to_link.object_files}"],
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iterate_over = "libraries_to_link.object_files",
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),
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],
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iterate_over = "libraries_to_link",
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),
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flag_group(
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expand_if_available = "linker_param_file",
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flags = ["@%{linker_param_file}"],
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),
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],
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)],
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)
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# Note that the order of features is significant in this list and determines the
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# relative order of flags from the features listed.
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linking_features = [
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link_libraries_feature,
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archiving_feature,
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]
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