# Copyright 2019 The Bazel Authors. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""A C++ toolchain configuration rule for macOS."""

load(
    "@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
    "action_config",
    "artifact_name_pattern",
    "env_entry",
    "env_set",
    "feature",
    "feature_set",
    "flag_group",
    "flag_set",
    "make_variable",
    "tool",
    "tool_path",
    "variable_with_value",
    "with_feature_set",
)
load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")

# The Xcode version from which that has support for deterministic mode
_SUPPORTS_DETERMINISTIC_MODE = "10.2"

def _compare_versions(dv1, v2):
    """Return value is <0, 0, >0 depending on DottedVersion dv1 comparison to string v2."""
    return dv1.compare_to(apple_common.dotted_version(v2))

def _can_use_deterministic_libtool(ctx):
    """Returns `True` if the current version of `libtool` has support for
    deterministic mode, and `False` otherwise."""
    xcode_config = ctx.attr._xcode_config[apple_common.XcodeVersionConfig]
    xcode_version = xcode_config.xcode_version()
    if _compare_versions(xcode_version, _SUPPORTS_DETERMINISTIC_MODE) >= 0:
        return True
    else:
        return False

def _deterministic_libtool_flags(ctx):
    """Returns additional `libtool` flags to enable deterministic mode, if they
    are available."""
    if _can_use_deterministic_libtool(ctx):
        return ["-D"]
    return []

def _target_os_version(ctx):
    platform_type = ctx.fragments.apple.single_arch_platform.platform_type
    xcode_config = ctx.attr._xcode_config[apple_common.XcodeVersionConfig]
    return xcode_config.minimum_os_for_platform_type(platform_type)

def _impl(ctx):
    target_os_version = _target_os_version(ctx)

    if (ctx.attr.cpu == "ios_arm64"):
        target_system_name = "arm64-apple-ios{}".format(target_os_version)
    elif (ctx.attr.cpu == "tvos_arm64"):
        target_system_name = "arm64-apple-tvos{}".format(target_os_version)
    elif (ctx.attr.cpu == "watchos_arm64_32"):
        target_system_name = "arm64_32-apple-watchos{}".format(target_os_version)
    elif (ctx.attr.cpu == "ios_arm64e"):
        target_system_name = "arm64e-apple-ios{}".format(target_os_version)
    elif (ctx.attr.cpu == "ios_armv7"):
        target_system_name = "armv7-apple-ios{}".format(target_os_version)
    elif (ctx.attr.cpu == "watchos_armv7k"):
        target_system_name = "armv7k-apple-watchos{}".format(target_os_version)
    elif (ctx.attr.cpu == "ios_i386"):
        target_system_name = "i386-apple-ios{}-simulator".format(target_os_version)
    elif (ctx.attr.cpu == "watchos_i386"):
        target_system_name = "i386-apple-watchos{}-simulator".format(target_os_version)
    elif (ctx.attr.cpu == "ios_x86_64"):
        target_system_name = "x86_64-apple-ios{}-simulator".format(target_os_version)
    elif (ctx.attr.cpu == "ios_sim_arm64"):
        target_system_name = "arm64-apple-ios{}-simulator".format(target_os_version)
    elif (ctx.attr.cpu == "tvos_sim_arm64"):
        target_system_name = "arm64-apple-tvos{}-simulator".format(target_os_version)
    elif (ctx.attr.cpu == "watchos_arm64"):
        target_system_name = "arm64-apple-watchos{}-simulator".format(target_os_version)
    elif (ctx.attr.cpu == "darwin_x86_64"):
        target_system_name = "x86_64-apple-macosx{}".format(target_os_version)
    elif (ctx.attr.cpu == "darwin_arm64"):
        target_system_name = "arm64-apple-macosx{}".format(target_os_version)
    elif (ctx.attr.cpu == "darwin_arm64e"):
        target_system_name = "arm64e-apple-macosx{}".format(target_os_version)
    elif (ctx.attr.cpu == "tvos_x86_64"):
        target_system_name = "x86_64-apple-tvos{}-simulator".format(target_os_version)
    elif (ctx.attr.cpu == "watchos_x86_64"):
        target_system_name = "x86_64-apple-watchos{}-simulator".format(target_os_version)
    else:
        fail("Unreachable")

    if ctx.attr.cpu.startswith("darwin_"):
        target_libc = "macosx"
    else:
        target_libc = ctx.attr.cpu.split("_")[0]

    if ctx.attr.cpu == "darwin_x86_64":
        abi_libc_version = "darwin_x86_64"
        abi_version = "darwin_x86_64"
    else:
        abi_libc_version = "local"
        abi_version = "local"

    host_system_name = "x86_64-apple-macosx"
    arch = ctx.attr.cpu.split("_", 1)[-1]
    if ctx.attr.cpu in ["ios_sim_arm64", "tvos_sim_arm64", "watchos_arm64"]:
        arch = "arm64"

    all_compile_actions = [
        ACTION_NAMES.c_compile,
        ACTION_NAMES.cpp_compile,
        ACTION_NAMES.linkstamp_compile,
        ACTION_NAMES.assemble,
        ACTION_NAMES.preprocess_assemble,
        ACTION_NAMES.cpp_header_parsing,
        ACTION_NAMES.cpp_module_compile,
        ACTION_NAMES.cpp_module_codegen,
        ACTION_NAMES.clif_match,
        ACTION_NAMES.lto_backend,
    ]

    all_cpp_compile_actions = [
        ACTION_NAMES.cpp_compile,
        ACTION_NAMES.linkstamp_compile,
        ACTION_NAMES.cpp_header_parsing,
        ACTION_NAMES.cpp_module_compile,
        ACTION_NAMES.cpp_module_codegen,
        ACTION_NAMES.clif_match,
    ]

    preprocessor_compile_actions = [
        ACTION_NAMES.c_compile,
        ACTION_NAMES.cpp_compile,
        ACTION_NAMES.linkstamp_compile,
        ACTION_NAMES.preprocess_assemble,
        ACTION_NAMES.cpp_header_parsing,
        ACTION_NAMES.cpp_module_compile,
        ACTION_NAMES.clif_match,
    ]

    codegen_compile_actions = [
        ACTION_NAMES.c_compile,
        ACTION_NAMES.cpp_compile,
        ACTION_NAMES.linkstamp_compile,
        ACTION_NAMES.assemble,
        ACTION_NAMES.preprocess_assemble,
        ACTION_NAMES.cpp_module_codegen,
        ACTION_NAMES.lto_backend,
    ]

    all_link_actions = [
        ACTION_NAMES.cpp_link_executable,
        ACTION_NAMES.cpp_link_dynamic_library,
        ACTION_NAMES.cpp_link_nodeps_dynamic_library,
    ]

    strip_action = action_config(
        action_name = ACTION_NAMES.strip,
        flag_sets = [
            flag_set(
                flag_groups = [
                    flag_group(flags = ["-S", "-o", "%{output_file}"]),
                    flag_group(
                        flags = ["%{stripopts}"],
                        iterate_over = "stripopts",
                    ),
                    flag_group(flags = ["%{input_file}"]),
                ],
            ),
        ],
        tools = [tool(path = "/usr/bin/strip")],
    )

    xcode_config = ctx.attr._xcode_config[apple_common.XcodeVersionConfig]
    xcode_execution_requirements = xcode_config.execution_info().keys()

    cpp_header_parsing_action = action_config(
        action_name = ACTION_NAMES.cpp_header_parsing,
        implies = [
            "preprocessor_defines",
            "include_system_dirs",
            "objc_arc",
            "no_objc_arc",
            "apple_env",
            "user_compile_flags",
            "sysroot",
            "unfiltered_compile_flags",
            "compiler_input_flags",
            "compiler_output_flags",
            "unfiltered_cxx_flags",
        ],
        tools = [
            tool(
                path = "wrapped_clang",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    objc_compile_action = action_config(
        action_name = ACTION_NAMES.objc_compile,
        flag_sets = [
            flag_set(
                flag_groups = [flag_group(flags = ["-target", target_system_name])],
            ),
        ],
        implies = [
            "compiler_input_flags",
            "compiler_output_flags",
            "objc_actions",
            "apply_default_compiler_flags",
            "apply_default_warnings",
            "framework_paths",
            "preprocessor_defines",
            "include_system_dirs",
            "objc_arc",
            "no_objc_arc",
            "apple_env",
            "user_compile_flags",
            "sysroot",
            "unfiltered_compile_flags",
            "apply_simulator_compiler_flags",
        ],
        tools = [
            tool(
                path = "wrapped_clang",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    objcpp_executable_action = action_config(
        action_name = "objc++-executable",
        flag_sets = [
            flag_set(
                flag_groups = [
                    flag_group(flags = ["-stdlib=libc++", "-std=gnu++11"]),
                    flag_group(flags = ["-target", target_system_name]),
                    flag_group(
                        flags = [
                            "-Xlinker",
                            "-objc_abi_version",
                            "-Xlinker",
                            "2",
                            "-fobjc-link-runtime",
                            "-ObjC",
                        ],
                    ),
                    flag_group(
                        flags = ["-l%{library_names}"],
                        iterate_over = "library_names",
                    ),
                    flag_group(flags = ["-filelist", "%{filelist}"]),
                    flag_group(flags = ["-o", "%{linked_binary}"]),
                    flag_group(
                        flags = ["-force_load", "%{force_load_exec_paths}"],
                        iterate_over = "force_load_exec_paths",
                    ),
                    flag_group(
                        flags = ["%{dep_linkopts}"],
                        iterate_over = "dep_linkopts",
                    ),
                    flag_group(
                        flags = ["-Wl,%{attr_linkopts}"],
                        iterate_over = "attr_linkopts",
                    ),
                ],
            ),
        ],
        implies = [
            "include_system_dirs",
            "framework_paths",
            "strip_debug_symbols",
            "apple_env",
            "apply_implicit_frameworks",
        ],
        tools = [
            tool(
                path = "wrapped_clang_pp",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    cpp_link_dynamic_library_action = action_config(
        action_name = ACTION_NAMES.cpp_link_dynamic_library,
        implies = [
            "contains_objc_source",
            "has_configured_linker_path",
            "symbol_counts",
            "shared_flag",
            "linkstamps",
            "output_execpath_flags",
            "runtime_root_flags",
            "input_param_flags",
            "strip_debug_symbols",
            "linker_param_file",
            "apple_env",
            "sysroot",
            "cpp_linker_flags",
        ],
        tools = [
            tool(
                path = "cc_wrapper.sh",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    cpp_link_static_library_action = action_config(
        action_name = ACTION_NAMES.cpp_link_static_library,
        implies = [
            "runtime_root_flags",
            "archiver_flags",
            "input_param_flags",
            "linker_param_file",
            "apple_env",
        ],
        tools = [
            tool(
                path = "libtool",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    c_compile_action = action_config(
        action_name = ACTION_NAMES.c_compile,
        implies = [
            "preprocessor_defines",
            "include_system_dirs",
            "objc_arc",
            "no_objc_arc",
            "apple_env",
            "user_compile_flags",
            "sysroot",
            "unfiltered_compile_flags",
            "compiler_input_flags",
            "compiler_output_flags",
            "unfiltered_cxx_flags",
        ],
        tools = [
            tool(
                path = "wrapped_clang",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    cpp_compile_action = action_config(
        action_name = ACTION_NAMES.cpp_compile,
        implies = [
            "preprocessor_defines",
            "include_system_dirs",
            "objc_arc",
            "no_objc_arc",
            "apple_env",
            "user_compile_flags",
            "sysroot",
            "unfiltered_compile_flags",
            "compiler_input_flags",
            "compiler_output_flags",
            "unfiltered_cxx_flags",
        ],
        tools = [
            tool(
                path = "wrapped_clang_pp",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    objcpp_compile_action = action_config(
        action_name = ACTION_NAMES.objcpp_compile,
        flag_sets = [
            flag_set(
                flag_groups = [
                    flag_group(
                        flags = [
                            "-target",
                            target_system_name,
                            "-stdlib=libc++",
                            "-std=gnu++11",
                        ],
                    ),
                ],
            ),
        ],
        implies = [
            "compiler_input_flags",
            "compiler_output_flags",
            "apply_default_compiler_flags",
            "apply_default_warnings",
            "framework_paths",
            "preprocessor_defines",
            "include_system_dirs",
            "objc_arc",
            "no_objc_arc",
            "apple_env",
            "user_compile_flags",
            "sysroot",
            "unfiltered_compile_flags",
            "apply_simulator_compiler_flags",
        ],
        tools = [
            tool(
                path = "wrapped_clang_pp",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    assemble_action = action_config(
        action_name = ACTION_NAMES.assemble,
        implies = [
            "objc_arc",
            "no_objc_arc",
            "include_system_dirs",
            "apple_env",
            "user_compile_flags",
            "sysroot",
            "unfiltered_compile_flags",
            "compiler_input_flags",
            "compiler_output_flags",
            "unfiltered_cxx_flags",
        ],
        tools = [
            tool(
                path = "wrapped_clang",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    preprocess_assemble_action = action_config(
        action_name = ACTION_NAMES.preprocess_assemble,
        implies = [
            "preprocessor_defines",
            "include_system_dirs",
            "objc_arc",
            "no_objc_arc",
            "apple_env",
            "user_compile_flags",
            "sysroot",
            "unfiltered_compile_flags",
            "compiler_input_flags",
            "compiler_output_flags",
            "unfiltered_cxx_flags",
        ],
        tools = [
            tool(
                path = "wrapped_clang",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    objc_archive_action = action_config(
        action_name = "objc-archive",
        flag_sets = [
            flag_set(
                flag_groups = [
                    flag_group(
                        flags = _deterministic_libtool_flags(ctx) + [
                            "-no_warning_for_no_symbols",
                            "-static",
                            "-filelist",
                            "%{obj_list_path}",
                            "-arch_only",
                            arch,
                            "-syslibroot",
                            "%{sdk_dir}",
                            "-o",
                            "%{output_execpath}",
                        ],
                    ),
                ],
            ),
        ],
        implies = ["apple_env"],
        tools = [
            tool(
                path = "libtool",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    objc_executable_action = action_config(
        action_name = "objc-executable",
        flag_sets = [
            flag_set(
                flag_groups = [
                    flag_group(
                        flags = [
                            "-Xlinker",
                            "-objc_abi_version",
                            "-Xlinker",
                            "2",
                            "-fobjc-link-runtime",
                            "-ObjC",
                        ],
                    ),
                ],
                with_features = [with_feature_set(not_features = ["kernel_extension"])],
            ),
            flag_set(
                flag_groups = [
                    flag_group(flags = ["-target", target_system_name]),
                    flag_group(
                        flags = ["-l%{library_names}"],
                        iterate_over = "library_names",
                    ),
                    flag_group(flags = ["-filelist", "%{filelist}"]),
                    flag_group(flags = ["-o", "%{linked_binary}"]),
                    flag_group(
                        flags = ["-force_load", "%{force_load_exec_paths}"],
                        iterate_over = "force_load_exec_paths",
                    ),
                    flag_group(
                        flags = ["%{dep_linkopts}"],
                        iterate_over = "dep_linkopts",
                    ),
                    flag_group(
                        flags = ["-Wl,%{attr_linkopts}"],
                        iterate_over = "attr_linkopts",
                    ),
                ],
            ),
        ],
        implies = [
            "include_system_dirs",
            "framework_paths",
            "strip_debug_symbols",
            "apple_env",
            "apply_implicit_frameworks",
        ],
        tools = [
            tool(
                path = "wrapped_clang",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    cpp_link_executable_action = action_config(
        action_name = ACTION_NAMES.cpp_link_executable,
        implies = [
            "contains_objc_source",
            "symbol_counts",
            "linkstamps",
            "output_execpath_flags",
            "runtime_root_flags",
            "input_param_flags",
            "force_pic_flags",
            "strip_debug_symbols",
            "linker_param_file",
            "apple_env",
            "sysroot",
            "cpp_linker_flags",
        ],
        tools = [
            tool(
                path = "cc_wrapper.sh",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    linkstamp_compile_action = action_config(
        action_name = ACTION_NAMES.linkstamp_compile,
        implies = [
            "preprocessor_defines",
            "include_system_dirs",
            "objc_arc",
            "no_objc_arc",
            "apple_env",
            "user_compile_flags",
            "sysroot",
            "unfiltered_compile_flags",
            "compiler_input_flags",
            "compiler_output_flags",
        ],
        tools = [
            tool(
                path = "wrapped_clang",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    cpp_module_compile_action = action_config(
        action_name = ACTION_NAMES.cpp_module_compile,
        implies = [
            "preprocessor_defines",
            "include_system_dirs",
            "objc_arc",
            "no_objc_arc",
            "apple_env",
            "user_compile_flags",
            "sysroot",
            "unfiltered_compile_flags",
            "compiler_input_flags",
            "compiler_output_flags",
            "unfiltered_cxx_flags",
        ],
        tools = [
            tool(
                path = "wrapped_clang",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    cpp_link_nodeps_dynamic_library_action = action_config(
        action_name = ACTION_NAMES.cpp_link_nodeps_dynamic_library,
        implies = [
            "contains_objc_source",
            "has_configured_linker_path",
            "symbol_counts",
            "shared_flag",
            "linkstamps",
            "output_execpath_flags",
            "runtime_root_flags",
            "input_param_flags",
            "strip_debug_symbols",
            "linker_param_file",
            "apple_env",
            "sysroot",
            "cpp_linker_flags",
        ],
        tools = [
            tool(
                path = "cc_wrapper.sh",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    objc_fully_link_action = action_config(
        action_name = "objc-fully-link",
        flag_sets = [
            flag_set(
                flag_groups = [
                    flag_group(
                        flags = _deterministic_libtool_flags(ctx) + [
                            "-no_warning_for_no_symbols",
                            "-static",
                            "-arch_only",
                            arch,
                            "-syslibroot",
                            "%{sdk_dir}",
                            "-o",
                            "%{fully_linked_archive_path}",
                        ],
                    ),
                    flag_group(
                        flags = ["%{objc_library_exec_paths}"],
                        iterate_over = "objc_library_exec_paths",
                    ),
                    flag_group(
                        flags = ["%{cc_library_exec_paths}"],
                        iterate_over = "cc_library_exec_paths",
                    ),
                    flag_group(
                        flags = ["%{imported_library_exec_paths}"],
                        iterate_over = "imported_library_exec_paths",
                    ),
                ],
            ),
        ],
        implies = ["apple_env"],
        tools = [
            tool(
                path = "libtool",
                execution_requirements = xcode_execution_requirements,
            ),
        ],
    )

    objcopy_embed_data_action = action_config(
        action_name = "objcopy_embed_data",
        enabled = True,
        tools = [tool(path = "/usr/bin/objcopy")],
    )

    action_configs = [
        strip_action,
        c_compile_action,
        cpp_compile_action,
        linkstamp_compile_action,
        cpp_module_compile_action,
        cpp_header_parsing_action,
        objc_compile_action,
        objcpp_compile_action,
        assemble_action,
        preprocess_assemble_action,
        objc_archive_action,
        objc_executable_action,
        objcpp_executable_action,
        cpp_link_executable_action,
        cpp_link_dynamic_library_action,
        cpp_link_nodeps_dynamic_library_action,
        cpp_link_static_library_action,
        objc_fully_link_action,
        objcopy_embed_data_action,
    ]

    if (ctx.attr.cpu == "ios_arm64" or
        ctx.attr.cpu == "ios_arm64e" or
        ctx.attr.cpu == "ios_armv7" or
        ctx.attr.cpu == "ios_i386" or
        ctx.attr.cpu == "ios_x86_64" or
        ctx.attr.cpu == "ios_sim_arm64" or
        ctx.attr.cpu == "watchos_arm64_32" or
        ctx.attr.cpu == "watchos_armv7k" or
        ctx.attr.cpu == "watchos_i386" or
        ctx.attr.cpu == "watchos_x86_64" or
        ctx.attr.cpu == "watchos_arm64"):
        apply_default_compiler_flags_feature = feature(
            name = "apply_default_compiler_flags",
            flag_sets = [
                flag_set(
                    actions = [ACTION_NAMES.objc_compile, ACTION_NAMES.objcpp_compile],
                    flag_groups = [flag_group(flags = ["-DOS_IOS", "-fno-autolink"])],
                ),
            ],
        )
    elif (ctx.attr.cpu == "darwin_x86_64" or
          ctx.attr.cpu == "darwin_arm64" or
          ctx.attr.cpu == "darwin_arm64e"):
        apply_default_compiler_flags_feature = feature(
            name = "apply_default_compiler_flags",
            flag_sets = [
                flag_set(
                    actions = [ACTION_NAMES.objc_compile, ACTION_NAMES.objcpp_compile],
                    flag_groups = [flag_group(flags = ["-DOS_MACOSX", "-fno-autolink"])],
                ),
            ],
        )
    elif (ctx.attr.cpu == "tvos_arm64" or
          ctx.attr.cpu == "tvos_x86_64" or
          ctx.attr.cpu == "tvos_sim_arm64"):
        apply_default_compiler_flags_feature = feature(
            name = "apply_default_compiler_flags",
            flag_sets = [
                flag_set(
                    actions = [ACTION_NAMES.objc_compile, ACTION_NAMES.objcpp_compile],
                    flag_groups = [flag_group(flags = ["-DOS_TVOS", "-fno-autolink"])],
                ),
            ],
        )
    else:
        apply_default_compiler_flags_feature = None

    dynamic_linking_mode_feature = feature(name = "dynamic_linking_mode")

    compile_all_modules_feature = feature(name = "compile_all_modules")

    runtime_root_flags_feature = feature(
        name = "runtime_root_flags",
        flag_sets = [
            flag_set(
                actions = all_link_actions +
                          [ACTION_NAMES.cpp_link_static_library],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-Xlinker",
                            "-rpath",
                            "-Xlinker",
                            "@loader_path/%{runtime_library_search_directories}",
                        ],
                        iterate_over = "runtime_library_search_directories",
                        expand_if_available = "runtime_library_search_directories",
                    ),
                ],
            ),
            flag_set(
                actions = all_link_actions +
                          [ACTION_NAMES.cpp_link_static_library],
                flag_groups = [
                    flag_group(
                        flags = ["%{runtime_root_flags}"],
                        iterate_over = "runtime_root_flags",
                        expand_if_available = "runtime_root_flags",
                    ),
                ],
            ),
            flag_set(
                actions = all_link_actions +
                          [ACTION_NAMES.cpp_link_static_library],
                flag_groups = [
                    flag_group(
                        flags = ["%{runtime_root_entries}"],
                        iterate_over = "runtime_root_entries",
                        expand_if_available = "runtime_root_entries",
                    ),
                ],
            ),
        ],
    )

    objc_arc_feature = feature(
        name = "objc_arc",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-fobjc-arc"],
                        expand_if_available = "objc_arc",
                    ),
                ],
            ),
        ],
    )

    unfiltered_cxx_flags_feature = feature(
        name = "unfiltered_cxx_flags",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                ],
                flag_groups = [
                    flag_group(flags = ["-no-canonical-prefixes", "-pthread"]),
                ],
            ),
        ],
    )

    compiler_input_flags_feature = feature(
        name = "compiler_input_flags",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-c", "%{source_file}"],
                        expand_if_available = "source_file",
                    ),
                ],
            ),
        ],
    )

    strip_debug_symbols_feature = feature(
        name = "strip_debug_symbols",
        flag_sets = [
            flag_set(
                actions = all_link_actions +
                          ["objc-executable", "objc++-executable"],
                flag_groups = [
                    flag_group(
                        flags = ["-Wl,-S"],
                        expand_if_available = "strip_debug_symbols",
                    ),
                ],
            ),
        ],
    )

    shared_flag_feature = feature(
        name = "shared_flag",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.cpp_link_dynamic_library,
                    ACTION_NAMES.cpp_link_nodeps_dynamic_library,
                ],
                flag_groups = [flag_group(flags = ["-shared"])],
            ),
        ],
    )

    if (ctx.attr.cpu == "ios_i386" or
        ctx.attr.cpu == "ios_x86_64" or
        ctx.attr.cpu == "ios_sim_arm64" or
        ctx.attr.cpu == "tvos_x86_64" or
        ctx.attr.cpu == "tvos_sim_arm64" or
        ctx.attr.cpu == "watchos_i386" or
        ctx.attr.cpu == "watchos_x86_64" or
        ctx.attr.cpu == "watchos_arm64"):
        apply_simulator_compiler_flags_feature = feature(
            name = "apply_simulator_compiler_flags",
            flag_sets = [
                flag_set(
                    actions = [ACTION_NAMES.objc_compile, ACTION_NAMES.objcpp_compile],
                    flag_groups = [
                        flag_group(
                            flags = [
                                "-fexceptions",
                                "-fasm-blocks",
                                "-fobjc-abi-version=2",
                                "-fobjc-legacy-dispatch",
                            ],
                        ),
                    ],
                ),
            ],
        )
    else:
        apply_simulator_compiler_flags_feature = feature(name = "apply_simulator_compiler_flags")

    supports_pic_feature = feature(name = "supports_pic", enabled = True)

    fastbuild_feature = feature(name = "fastbuild")

    no_legacy_features_feature = feature(name = "no_legacy_features")

    symbol_counts_feature = feature(
        name = "symbol_counts",
        flag_sets = [
            flag_set(
                actions = all_link_actions,
                flag_groups = [
                    flag_group(
                        flags = ["-Wl,--print-symbol-counts=%{symbol_counts_output}"],
                        expand_if_available = "symbol_counts_output",
                    ),
                ],
            ),
        ],
    )

    user_link_flags_feature = feature(
        name = "user_link_flags",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = all_link_actions +
                          ["objc-executable", "objc++-executable"],
                flag_groups = [
                    flag_group(
                        flags = ["%{user_link_flags}"],
                        iterate_over = "user_link_flags",
                        expand_if_available = "user_link_flags",
                    ),
                ],
            ),
        ],
    )

    if (ctx.attr.cpu == "ios_arm64" or
        ctx.attr.cpu == "ios_arm64e" or
        ctx.attr.cpu == "ios_armv7" or
        ctx.attr.cpu == "ios_i386" or
        ctx.attr.cpu == "ios_x86_64" or
        ctx.attr.cpu == "ios_sim_arm64" or
        ctx.attr.cpu == "tvos_arm64" or
        ctx.attr.cpu == "tvos_x86_64" or
        ctx.attr.cpu == "tvos_sim_arm64" or
        ctx.attr.cpu == "watchos_arm64_32" or
        ctx.attr.cpu == "watchos_armv7k" or
        ctx.attr.cpu == "watchos_i386" or
        ctx.attr.cpu == "watchos_x86_64" or
        ctx.attr.cpu == "watchos_arm64"):
        contains_objc_source_feature = feature(
            name = "contains_objc_source",
            flag_sets = [
                flag_set(
                    actions = [
                        ACTION_NAMES.cpp_link_dynamic_library,
                        ACTION_NAMES.cpp_link_nodeps_dynamic_library,
                        ACTION_NAMES.cpp_link_executable,
                    ],
                    flag_groups = [flag_group(flags = ["-fobjc-link-runtime"])],
                ),
                flag_set(
                    actions = [
                        ACTION_NAMES.cpp_link_dynamic_library,
                        ACTION_NAMES.cpp_link_nodeps_dynamic_library,
                        ACTION_NAMES.cpp_link_executable,
                    ],
                    flag_groups = [flag_group(flags = ["-framework", "UIKit"])],
                ),
            ],
        )
    elif (ctx.attr.cpu == "darwin_x86_64" or
          ctx.attr.cpu == "darwin_arm64" or
          ctx.attr.cpu == "darwin_arm64e"):
        contains_objc_source_feature = feature(
            name = "contains_objc_source",
            flag_sets = [
                flag_set(
                    actions = [
                        ACTION_NAMES.cpp_link_dynamic_library,
                        ACTION_NAMES.cpp_link_nodeps_dynamic_library,
                        ACTION_NAMES.cpp_link_executable,
                    ],
                    flag_groups = [flag_group(flags = ["-fobjc-link-runtime"])],
                ),
            ],
        )
    else:
        contains_objc_source_feature = None

    includes_feature = feature(
        name = "includes",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                    ACTION_NAMES.clif_match,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-include", "%{includes}"],
                        iterate_over = "includes",
                        expand_if_available = "includes",
                    ),
                ],
            ),
        ],
    )

    gcc_coverage_map_format_feature = feature(
        name = "gcc_coverage_map_format",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-fprofile-arcs", "-ftest-coverage", "-g"],
                    ),
                ],
            ),
            flag_set(
                actions = [
                    ACTION_NAMES.cpp_link_dynamic_library,
                    ACTION_NAMES.cpp_link_nodeps_dynamic_library,
                    ACTION_NAMES.cpp_link_executable,
                ],
                flag_groups = [flag_group(flags = ["--coverage"])],
            ),
        ],
        requires = [feature_set(features = ["coverage"])],
    )

    if (ctx.attr.cpu == "darwin_x86_64" or
        ctx.attr.cpu == "darwin_arm64" or
        ctx.attr.cpu == "darwin_arm64e"):
        default_link_flags_feature = feature(
            name = "default_link_flags",
            enabled = True,
            flag_sets = [
                flag_set(
                    actions = all_link_actions +
                              ["objc-executable", "objc++-executable"],
                    flag_groups = [
                        flag_group(
                            flags = [
                                "-no-canonical-prefixes",
                                "-target",
                                target_system_name,
                            ],
                        ),
                    ],
                ),
                flag_set(
                    actions = [
                        ACTION_NAMES.cpp_link_dynamic_library,
                        ACTION_NAMES.cpp_link_nodeps_dynamic_library,
                    ],
                    flag_groups = [flag_group(flags = ["-undefined", "dynamic_lookup"])],
                ),
                flag_set(
                    actions = [
                        ACTION_NAMES.cpp_link_executable,
                        "objc-executable",
                        "objc++-executable",
                    ],
                    flag_groups = [flag_group(flags = ["-undefined", "dynamic_lookup"])],
                    with_features = [with_feature_set(features = ["dynamic_linking_mode"])],
                ),
            ],
        )
    else:
        default_link_flags_feature = feature(
            name = "default_link_flags",
            enabled = True,
            flag_sets = [
                flag_set(
                    actions = all_link_actions +
                              ["objc-executable", "objc++-executable"],
                    flag_groups = [
                        flag_group(
                            flags = [
                                "-no-canonical-prefixes",
                                "-target",
                                target_system_name,
                            ],
                        ),
                    ],
                ),
            ],
        )

    no_deduplicate_feature = feature(
        name = "no_deduplicate",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = all_link_actions +
                          ["objc-executable", "objc++-executable"],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-Xlinker",
                            "-no_deduplicate",
                        ],
                    ),
                ],
                with_features = [
                    with_feature_set(not_features = ["opt"]),
                ],
            ),
        ],
    )

    output_execpath_flags_feature = feature(
        name = "output_execpath_flags",
        flag_sets = [
            flag_set(
                actions = all_link_actions,
                flag_groups = [
                    flag_group(
                        flags = ["-o", "%{output_execpath}"],
                        expand_if_available = "output_execpath",
                    ),
                ],
            ),
        ],
    )

    pic_feature = feature(
        name = "pic",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.preprocess_assemble,
                ],
                flag_groups = [
                    flag_group(flags = ["-fPIC"], expand_if_available = "pic"),
                ],
            ),
        ],
    )

    framework_paths_feature = feature(
        name = "framework_paths",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-F%{framework_include_paths}"],
                        iterate_over = "framework_include_paths",
                    ),
                ],
            ),
            flag_set(
                actions = [
                    "objc-executable",
                    "objc++-executable",
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-F%{framework_paths}"],
                        iterate_over = "framework_paths",
                    ),
                    flag_group(
                        flags = ["-framework", "%{framework_names}"],
                        iterate_over = "framework_names",
                    ),
                    flag_group(
                        flags = ["-weak_framework", "%{weak_framework_names}"],
                        iterate_over = "weak_framework_names",
                    ),
                ],
            ),
        ],
    )

    compiler_output_flags_feature = feature(
        name = "compiler_output_flags",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-S"],
                        expand_if_available = "output_assembly_file",
                    ),
                    flag_group(
                        flags = ["-E"],
                        expand_if_available = "output_preprocess_file",
                    ),
                    flag_group(
                        flags = ["-o", "%{output_file}"],
                        expand_if_available = "output_file",
                    ),
                ],
            ),
        ],
    )

    opt_feature = feature(name = "opt")

    pch_feature = feature(
        name = "pch",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-include",
                            "%{pch_file}",
                        ],
                        expand_if_available = "pch_file",
                    ),
                ],
            ),
        ],
    )

    coverage_feature = feature(name = "coverage")

    include_system_dirs_feature = feature(
        name = "include_system_dirs",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                    "objc-executable",
                    "objc++-executable",
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                ],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-isysroot",
                            "%{sdk_dir}",
                            "-F%{sdk_framework_dir}",
                            "-F%{platform_developer_framework_dir}",
                        ],
                    ),
                ],
            ),
        ],
    )

    input_param_flags_feature = feature(
        name = "input_param_flags",
        flag_sets = [
            flag_set(
                actions = all_link_actions +
                          [ACTION_NAMES.cpp_link_static_library],
                flag_groups = [
                    flag_group(
                        flags = ["-L%{library_search_directories}"],
                        iterate_over = "library_search_directories",
                        expand_if_available = "library_search_directories",
                    ),
                ],
            ),
            flag_set(
                actions = all_link_actions +
                          [ACTION_NAMES.cpp_link_static_library],
                flag_groups = [
                    flag_group(
                        flags = ["%{libopts}"],
                        iterate_over = "libopts",
                        expand_if_available = "libopts",
                    ),
                ],
            ),
            flag_set(
                actions = all_link_actions +
                          [ACTION_NAMES.cpp_link_static_library],
                flag_groups = [
                    flag_group(
                        flags = ["-Wl,-force_load,%{whole_archive_linker_params}"],
                        iterate_over = "whole_archive_linker_params",
                        expand_if_available = "whole_archive_linker_params",
                    ),
                ],
            ),
            flag_set(
                actions = all_link_actions +
                          [ACTION_NAMES.cpp_link_static_library],
                flag_groups = [
                    flag_group(
                        flags = ["%{linker_input_params}"],
                        iterate_over = "linker_input_params",
                        expand_if_available = "linker_input_params",
                    ),
                ],
            ),
            flag_set(
                actions = all_link_actions +
                          [ACTION_NAMES.cpp_link_static_library],
                flag_groups = [
                    flag_group(
                        iterate_over = "libraries_to_link",
                        flag_groups = [
                            flag_group(
                                iterate_over = "libraries_to_link.object_files",
                                flag_groups = [
                                    flag_group(
                                        flags = ["%{libraries_to_link.object_files}"],
                                        expand_if_false = "libraries_to_link.is_whole_archive",
                                    ),
                                    flag_group(
                                        flags = ["-Wl,-force_load,%{libraries_to_link.object_files}"],
                                        expand_if_true = "libraries_to_link.is_whole_archive",
                                    ),
                                ],
                                expand_if_equal = variable_with_value(
                                    name = "libraries_to_link.type",
                                    value = "object_file_group",
                                ),
                            ),
                            flag_group(
                                flag_groups = [
                                    flag_group(
                                        flags = ["%{libraries_to_link.name}"],
                                        expand_if_false = "libraries_to_link.is_whole_archive",
                                    ),
                                    flag_group(
                                        flags = ["-Wl,-force_load,%{libraries_to_link.name}"],
                                        expand_if_true = "libraries_to_link.is_whole_archive",
                                    ),
                                ],
                                expand_if_equal = variable_with_value(
                                    name = "libraries_to_link.type",
                                    value = "object_file",
                                ),
                            ),
                            flag_group(
                                flag_groups = [
                                    flag_group(
                                        flags = ["%{libraries_to_link.name}"],
                                        expand_if_false = "libraries_to_link.is_whole_archive",
                                    ),
                                    flag_group(
                                        flags = ["-Wl,-force_load,%{libraries_to_link.name}"],
                                        expand_if_true = "libraries_to_link.is_whole_archive",
                                    ),
                                ],
                                expand_if_equal = variable_with_value(
                                    name = "libraries_to_link.type",
                                    value = "interface_library",
                                ),
                            ),
                            flag_group(
                                flag_groups = [
                                    flag_group(
                                        flags = ["%{libraries_to_link.name}"],
                                        expand_if_false = "libraries_to_link.is_whole_archive",
                                    ),
                                    flag_group(
                                        flags = ["-Wl,-force_load,%{libraries_to_link.name}"],
                                        expand_if_true = "libraries_to_link.is_whole_archive",
                                    ),
                                ],
                                expand_if_equal = variable_with_value(
                                    name = "libraries_to_link.type",
                                    value = "static_library",
                                ),
                            ),
                            flag_group(
                                flag_groups = [
                                    flag_group(
                                        flags = ["-l%{libraries_to_link.name}"],
                                        expand_if_false = "libraries_to_link.is_whole_archive",
                                    ),
                                    flag_group(
                                        flags = ["-Wl,-force_load,-l%{libraries_to_link.name}"],
                                        expand_if_true = "libraries_to_link.is_whole_archive",
                                    ),
                                ],
                                expand_if_equal = variable_with_value(
                                    name = "libraries_to_link.type",
                                    value = "dynamic_library",
                                ),
                            ),
                            flag_group(
                                flag_groups = [
                                    flag_group(
                                        flags = ["%{libraries_to_link.path}"],
                                        expand_if_false = "libraries_to_link.is_whole_archive",
                                    ),
                                    flag_group(
                                        flags = ["-Wl,-force_load,%{libraries_to_link.path}"],
                                        expand_if_true = "libraries_to_link.is_whole_archive",
                                    ),
                                ],
                                expand_if_equal = variable_with_value(
                                    name = "libraries_to_link.type",
                                    value = "versioned_dynamic_library",
                                ),
                            ),
                        ],
                        expand_if_available = "libraries_to_link",
                    ),
                ],
            ),
        ],
    )

    per_object_debug_info_feature = feature(
        name = "per_object_debug_info",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-gsplit-dwarf", "-g"],
                        expand_if_available = "per_object_debug_info_file",
                    ),
                ],
            ),
        ],
    )

    lipo_feature = feature(
        name = "lipo",
        flag_sets = [
            flag_set(
                actions = [ACTION_NAMES.c_compile, ACTION_NAMES.cpp_compile],
                flag_groups = [flag_group(flags = ["-fripa"])],
            ),
        ],
        requires = [
            feature_set(features = ["autofdo"]),
            feature_set(features = ["fdo_optimize"]),
            feature_set(features = ["fdo_instrument"]),
        ],
    )

    apple_env_feature = feature(
        name = "apple_env",
        env_sets = [
            env_set(
                actions = [
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                    "objc-archive",
                    "objc-fully-link",
                    ACTION_NAMES.cpp_link_executable,
                    ACTION_NAMES.cpp_link_dynamic_library,
                    ACTION_NAMES.cpp_link_nodeps_dynamic_library,
                    ACTION_NAMES.cpp_link_static_library,
                    "objc-executable",
                    "objc++-executable",
                    ACTION_NAMES.linkstamp_compile,
                ],
                env_entries = [
                    env_entry(
                        key = "XCODE_VERSION_OVERRIDE",
                        value = "%{xcode_version_override_value}",
                    ),
                    env_entry(
                        key = "APPLE_SDK_VERSION_OVERRIDE",
                        value = "%{apple_sdk_version_override_value}",
                    ),
                    env_entry(
                        key = "APPLE_SDK_PLATFORM",
                        value = "%{apple_sdk_platform_value}",
                    ),
                    env_entry(
                        key = "ZERO_AR_DATE",
                        value = "1",
                    ),
                ] + [env_entry(key = key, value = value) for key, value in ctx.attr.extra_env.items()],
            ),
        ],
    )

    if (ctx.attr.cpu == "ios_arm64" or
        ctx.attr.cpu == "ios_arm64e" or
        ctx.attr.cpu == "ios_armv7" or
        ctx.attr.cpu == "ios_i386" or
        ctx.attr.cpu == "ios_x86_64" or
        ctx.attr.cpu == "ios_sim_arm64" or
        ctx.attr.cpu == "tvos_arm64" or
        ctx.attr.cpu == "tvos_x86_64" or
        ctx.attr.cpu == "tvos_sim_arm64" or
        ctx.attr.cpu == "watchos_arm64_32" or
        ctx.attr.cpu == "watchos_armv7k" or
        ctx.attr.cpu == "watchos_i386" or
        ctx.attr.cpu == "watchos_x86_64" or
        ctx.attr.cpu == "watchos_arm64"):
        apply_implicit_frameworks_feature = feature(
            name = "apply_implicit_frameworks",
            flag_sets = [
                flag_set(
                    actions = ["objc-executable", "objc++-executable"],
                    flag_groups = [
                        flag_group(
                            flags = ["-framework", "Foundation", "-framework", "UIKit"],
                        ),
                    ],
                ),
            ],
        )
    elif (ctx.attr.cpu == "darwin_x86_64" or
          ctx.attr.cpu == "darwin_arm64" or
          ctx.attr.cpu == "darwin_arm64e"):
        apply_implicit_frameworks_feature = feature(
            name = "apply_implicit_frameworks",
            flag_sets = [
                flag_set(
                    actions = ["objc-executable", "objc++-executable"],
                    flag_groups = [flag_group(flags = ["-framework", "Foundation"])],
                    with_features = [with_feature_set(not_features = ["kernel_extension"])],
                ),
            ],
        )
    else:
        apply_implicit_frameworks_feature = None

    dbg_feature = feature(name = "dbg")

    has_configured_linker_path_feature = feature(name = "has_configured_linker_path")

    random_seed_feature = feature(
        name = "random_seed",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.cpp_module_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-frandom-seed=%{output_file}"],
                        expand_if_available = "output_file",
                    ),
                ],
            ),
        ],
    )

    llvm_coverage_map_format_feature = feature(
        name = "llvm_coverage_map_format",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-fprofile-instr-generate", "-fcoverage-mapping", "-g"],
                    ),
                ],
            ),
            flag_set(
                actions = [
                    ACTION_NAMES.cpp_link_dynamic_library,
                    ACTION_NAMES.cpp_link_nodeps_dynamic_library,
                    ACTION_NAMES.cpp_link_executable,
                    "objc-executable",
                    "objc++-executable",
                ],
                flag_groups = [flag_group(flags = ["-fprofile-instr-generate"])],
            ),
        ],
        requires = [feature_set(features = ["coverage"])],
    )

    force_pic_flags_feature = feature(
        name = "force_pic_flags",
        flag_sets = [
            flag_set(
                actions = [ACTION_NAMES.cpp_link_executable],
                flag_groups = [
                    flag_group(
                        flags = ["-Wl,-pie"],
                        expand_if_available = "force_pic",
                    ),
                ],
            ),
        ],
    )

    sysroot_feature = feature(
        name = "sysroot",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_link_executable,
                    ACTION_NAMES.cpp_link_dynamic_library,
                    ACTION_NAMES.cpp_link_nodeps_dynamic_library,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.clif_match,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["--sysroot=%{sysroot}"],
                        expand_if_available = "sysroot",
                    ),
                ],
            ),
        ],
    )

    autofdo_feature = feature(
        name = "autofdo",
        flag_sets = [
            flag_set(
                actions = [ACTION_NAMES.c_compile, ACTION_NAMES.cpp_compile],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-fauto-profile=%{fdo_profile_path}",
                            "-fprofile-correction",
                        ],
                        expand_if_available = "fdo_profile_path",
                    ),
                ],
            ),
        ],
        provides = ["profile"],
    )

    link_libcpp_feature = feature(
        name = "link_libc++",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = all_link_actions +
                          ["objc-executable", "objc++-executable"],
                flag_groups = [flag_group(flags = ["-lc++"])],
                with_features = [with_feature_set(not_features = ["kernel_extension"])],
            ),
        ],
    )

    objc_actions_feature = feature(
        name = "objc_actions",
        implies = [
            "objc-compile",
            "objc++-compile",
            "objc-fully-link",
            "objc-archive",
            "objc-executable",
            "objc++-executable",
            "assemble",
            "preprocess-assemble",
            "c-compile",
            "c++-compile",
            "c++-link-static-library",
            "c++-link-dynamic-library",
            "c++-link-nodeps-dynamic-library",
            "c++-link-executable",
        ],
    )

    module_maps_feature = feature(name = "module_maps", enabled = True)

    unfiltered_compile_flags_feature = feature(
        name = "unfiltered_compile_flags",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.linkstamp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-no-canonical-prefixes",
                            "-Wno-builtin-macro-redefined",
                            "-D__DATE__=\"redacted\"",
                            "-D__TIMESTAMP__=\"redacted\"",
                            "-D__TIME__=\"redacted\"",
                            "-target",
                            target_system_name,
                        ],
                    ),
                ],
            ),
        ],
    )

    linker_param_file_feature = feature(
        name = "linker_param_file",
        flag_sets = [
            flag_set(
                actions = all_link_actions + [
                    ACTION_NAMES.cpp_link_static_library,
                    ACTION_NAMES.objc_archive,
                    ACTION_NAMES.objc_fully_link,
                    ACTION_NAMES.objc_executable,
                    ACTION_NAMES.objcpp_executable,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["@%{linker_param_file}"],
                        expand_if_available = "linker_param_file",
                    ),
                ],
            ),
        ],
    )

    relative_ast_path_feature = feature(
        name = "relative_ast_path",
        env_sets = [
            env_set(
                actions = all_link_actions + [
                    ACTION_NAMES.objc_executable,
                    ACTION_NAMES.objcpp_executable,
                ],
                env_entries = [
                    env_entry(
                        key = "RELATIVE_AST_PATH",
                        value = "true",
                    ),
                ],
            ),
        ],
    )

    archiver_flags_feature = feature(
        name = "archiver_flags",
        flag_sets = [
            flag_set(
                actions = [ACTION_NAMES.cpp_link_static_library],
                flag_groups = [
                    flag_group(
                        flags = _deterministic_libtool_flags(ctx) + [
                            "-no_warning_for_no_symbols",
                            "-static",
                            "-o",
                            "%{output_execpath}",
                        ],
                        expand_if_available = "output_execpath",
                    ),
                ],
            ),
        ],
    )

    fdo_optimize_feature = feature(
        name = "fdo_optimize",
        flag_sets = [
            flag_set(
                actions = [ACTION_NAMES.c_compile, ACTION_NAMES.cpp_compile],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-fprofile-use=%{fdo_profile_path}",
                            "-Wno-profile-instr-unprofiled",
                            "-Wno-profile-instr-out-of-date",
                            "-fprofile-correction",
                        ],
                        expand_if_available = "fdo_profile_path",
                    ),
                ],
            ),
        ],
        provides = ["profile"],
    )

    no_objc_arc_feature = feature(
        name = "no_objc_arc",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-fno-objc-arc"],
                        expand_if_available = "no_objc_arc",
                    ),
                ],
            ),
        ],
    )

    cpp_linker_flags_feature = feature(
        name = "cpp_linker_flags",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.cpp_link_executable,
                    ACTION_NAMES.cpp_link_dynamic_library,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-lc++", "-target", target_system_name],
                    ),
                ],
            ),
        ],
    )

    exclude_private_headers_in_module_maps_feature = feature(name = "exclude_private_headers_in_module_maps")

    debug_prefix_map_pwd_is_dot_feature = feature(
        name = "debug_prefix_map_pwd_is_dot",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [flag_group(flags = ["DEBUG_PREFIX_MAP_PWD=."])],
            ),
        ],
    )

    remap_xcode_path_feature = feature(
        name = "remap_xcode_path",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [flag_group(flags = [
                    "-fdebug-prefix-map=__BAZEL_XCODE_DEVELOPER_DIR__=DEVELOPER_DIR",
                ])],
            ),
        ],
    )

    linkstamps_feature = feature(
        name = "linkstamps",
        flag_sets = [
            flag_set(
                actions = all_link_actions,
                flag_groups = [
                    flag_group(
                        flags = ["%{linkstamp_paths}"],
                        iterate_over = "linkstamp_paths",
                        expand_if_available = "linkstamp_paths",
                    ),
                ],
            ),
        ],
    )

    include_paths_feature = feature(
        name = "include_paths",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.clif_match,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-iquote", "%{quote_include_paths}"],
                        iterate_over = "quote_include_paths",
                    ),
                    flag_group(
                        flags = ["-I%{include_paths}"],
                        iterate_over = "include_paths",
                    ),
                    flag_group(
                        flags = ["-isystem", "%{system_include_paths}"],
                        iterate_over = "system_include_paths",
                    ),
                ],
            ),
        ],
    )

    only_doth_headers_in_module_maps_feature = feature(name = "only_doth_headers_in_module_maps")

    default_compile_flags_feature = feature(
        name = "default_compile_flags",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.lto_backend,
                    ACTION_NAMES.clif_match,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-D_FORTIFY_SOURCE=1",
                        ],
                    ),
                ],
                with_features = [with_feature_set(not_features = ["asan"])],
            ),
            flag_set(
                actions = [
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.lto_backend,
                    ACTION_NAMES.clif_match,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-fstack-protector",
                            "-fcolor-diagnostics",
                            "-Wall",
                            "-Wthread-safety",
                            "-Wself-assign",
                            "-fno-omit-frame-pointer",
                        ],
                    ),
                ],
            ),
            flag_set(
                actions = [
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.lto_backend,
                    ACTION_NAMES.clif_match,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [flag_group(flags = ["-O0", "-DDEBUG"])],
                with_features = [with_feature_set(features = ["fastbuild"])],
            ),
            flag_set(
                actions = [
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.lto_backend,
                    ACTION_NAMES.clif_match,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-g0",
                            "-O2",
                            "-DNDEBUG",
                            "-DNS_BLOCK_ASSERTIONS=1",
                        ],
                    ),
                ],
                with_features = [with_feature_set(features = ["opt"])],
            ),
            flag_set(
                actions = [
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.lto_backend,
                    ACTION_NAMES.clif_match,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [flag_group(flags = ["-g"])],
                with_features = [with_feature_set(features = ["dbg"])],
            ),
            flag_set(
                actions = [
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.lto_backend,
                    ACTION_NAMES.clif_match,
                ],
                flag_groups = [flag_group(flags = ["-std=c++11"])],
            ),
        ],
    )

    objcopy_embed_flags_feature = feature(
        name = "objcopy_embed_flags",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = ["objcopy_embed_data"],
                flag_groups = [flag_group(flags = ["-I", "binary"])],
            ),
        ],
    )

    dead_strip_feature = feature(
        name = "dead_strip",
        flag_sets = [
            flag_set(
                actions = all_link_actions +
                          ["objc-executable", "objc++-executable"],
                flag_groups = [
                    flag_group(
                        flags = ["-dead_strip"],
                    ),
                ],
            ),
        ],
        requires = [feature_set(features = ["opt"])],
    )

    oso_prefix_feature = feature(
        name = "oso_prefix_is_pwd",
        flag_sets = [
            flag_set(
                actions = all_link_actions +
                          ["objc-executable", "objc++-executable"],
                flag_groups = [flag_group(flags = ["OSO_PREFIX_MAP_PWD"])],
            ),
        ],
    )

    generate_dsym_file_feature = feature(
        name = "generate_dsym_file",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                    "objc-executable",
                    "objc++-executable",
                ],
                flag_groups = [flag_group(flags = ["-g"])],
            ),
            flag_set(
                actions = ["objc-executable", "objc++-executable"],
                flag_groups = [
                    flag_group(
                        flags = [
                            "DSYM_HINT_LINKED_BINARY=%{linked_binary}",
                            "DSYM_HINT_DSYM_PATH=%{dsym_path}",
                        ],
                    ),
                ],
            ),
        ],
    )

    # Kernel extensions for Apple Silicon are arm64e.
    if (ctx.attr.cpu == "darwin_x86_64" or
        ctx.attr.cpu == "darwin_arm64e"):
        kernel_extension_feature = feature(
            name = "kernel_extension",
            flag_sets = [
                flag_set(
                    actions = ["objc-executable", "objc++-executable"],
                    flag_groups = [
                        flag_group(
                            flags = [
                                "-nostdlib",
                                "-lkmod",
                                "-lkmodc++",
                                "-lcc_kext",
                                "-Xlinker",
                                "-kext",
                            ],
                        ),
                    ],
                ),
            ],
        )
    else:
        kernel_extension_feature = feature(name = "kernel_extension")

    apply_default_warnings_feature = feature(
        name = "apply_default_warnings",
        flag_sets = [
            flag_set(
                actions = [ACTION_NAMES.objc_compile, ACTION_NAMES.objcpp_compile],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-Wshorten-64-to-32",
                            "-Wbool-conversion",
                            "-Wconstant-conversion",
                            "-Wduplicate-method-match",
                            "-Wempty-body",
                            "-Wenum-conversion",
                            "-Wint-conversion",
                            "-Wunreachable-code",
                            "-Wmismatched-return-types",
                            "-Wundeclared-selector",
                            "-Wuninitialized",
                            "-Wunused-function",
                            "-Wunused-variable",
                        ],
                    ),
                ],
            ),
        ],
    )

    dependency_file_feature = feature(
        name = "dependency_file",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-MD", "-MF", "%{dependency_file}"],
                        expand_if_available = "dependency_file",
                    ),
                ],
            ),
        ],
    )

    serialized_diagnostics_file_feature = feature(
        name = "serialized_diagnostics_file",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["--serialize-diagnostics", "%{serialized_diagnostics_file}"],
                        expand_if_available = "serialized_diagnostics_file",
                    ),
                ],
            ),
        ],
    )

    preprocessor_defines_feature = feature(
        name = "preprocessor_defines",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["-D%{preprocessor_defines}"],
                        iterate_over = "preprocessor_defines",
                    ),
                ],
            ),
        ],
    )

    fdo_instrument_feature = feature(
        name = "fdo_instrument",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_link_dynamic_library,
                    ACTION_NAMES.cpp_link_nodeps_dynamic_library,
                    ACTION_NAMES.cpp_link_executable,
                ],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-fprofile-generate=%{fdo_instrument_path}",
                            "-fno-data-sections",
                        ],
                        expand_if_available = "fdo_instrument_path",
                    ),
                ],
            ),
        ],
        provides = ["profile"],
    )

    if (ctx.attr.cpu == "darwin_x86_64" or
        ctx.attr.cpu == "darwin_arm64" or
        ctx.attr.cpu == "darwin_arm64e"):
        link_cocoa_feature = feature(
            name = "link_cocoa",
            flag_sets = [
                flag_set(
                    actions = ["objc-executable", "objc++-executable"],
                    flag_groups = [flag_group(flags = ["-framework", "Cocoa"])],
                ),
            ],
        )
    else:
        link_cocoa_feature = feature(name = "link_cocoa")

    user_compile_flags_feature = feature(
        name = "user_compile_flags",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.assemble,
                    ACTION_NAMES.preprocess_assemble,
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.cpp_header_parsing,
                    ACTION_NAMES.cpp_module_compile,
                    ACTION_NAMES.cpp_module_codegen,
                    ACTION_NAMES.linkstamp_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = ["%{user_compile_flags}"],
                        iterate_over = "user_compile_flags",
                        expand_if_available = "user_compile_flags",
                    ),
                ],
            ),
        ],
    )

    headerpad_feature = feature(
        name = "headerpad",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = all_link_actions + [
                    ACTION_NAMES.objc_executable,
                    ACTION_NAMES.objcpp_executable,
                ],
                flag_groups = [flag_group(flags = ["-headerpad_max_install_names"])],
                with_features = [with_feature_set(not_features = [
                    "bitcode_embedded",
                    "bitcode_embedded_markers",
                ])],
            ),
        ],
    )

    if (ctx.attr.cpu == "ios_arm64" or
        ctx.attr.cpu == "ios_arm64e" or
        ctx.attr.cpu == "ios_armv7" or
        ctx.attr.cpu == "tvos_arm64" or
        ctx.attr.cpu == "watchos_arm64_32" or
        ctx.attr.cpu == "watchos_armv7k" or
        ctx.attr.cpu == "darwin_x86_64" or
        ctx.attr.cpu == "darwin_arm64" or
        ctx.attr.cpu == "darwin_arm64e"):
        bitcode_embedded_feature = feature(
            name = "bitcode_embedded",
            flag_sets = [
                flag_set(
                    actions = [
                        ACTION_NAMES.c_compile,
                        ACTION_NAMES.cpp_compile,
                        ACTION_NAMES.objc_compile,
                        ACTION_NAMES.objcpp_compile,
                    ],
                    flag_groups = [flag_group(flags = ["-fembed-bitcode"])],
                ),
                flag_set(
                    actions = all_link_actions + [
                        ACTION_NAMES.objc_executable,
                        ACTION_NAMES.objcpp_executable,
                    ],
                    flag_groups = [
                        flag_group(
                            flags = [
                                "-fembed-bitcode",
                                "-Xlinker",
                                "-bitcode_verify",
                                "-Xlinker",
                                "-bitcode_hide_symbols",
                                "-Xlinker",
                                "-bitcode_symbol_map",
                                "-Xlinker",
                                "%{bitcode_symbol_map_path}",
                            ],
                            expand_if_available = "bitcode_symbol_map_path",
                        ),
                    ],
                ),
            ],
        )
        bitcode_embedded_markers_feature = feature(
            name = "bitcode_embedded_markers",
            flag_sets = [
                flag_set(
                    actions = [
                        ACTION_NAMES.c_compile,
                        ACTION_NAMES.cpp_compile,
                        ACTION_NAMES.objc_compile,
                        ACTION_NAMES.objcpp_compile,
                    ],
                    flag_groups = [flag_group(flags = ["-fembed-bitcode-marker"])],
                ),
                flag_set(
                    actions = all_link_actions + [
                        ACTION_NAMES.objc_executable,
                        ACTION_NAMES.objcpp_executable,
                    ],
                    flag_groups = [flag_group(flags = ["-fembed-bitcode-marker"])],
                ),
            ],
        )
    else:
        bitcode_embedded_markers_feature = feature(name = "bitcode_embedded_markers")
        bitcode_embedded_feature = feature(name = "bitcode_embedded")

    generate_linkmap_feature = feature(
        name = "generate_linkmap",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.objc_executable,
                    ACTION_NAMES.objcpp_executable,
                ],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-Xlinker",
                            "-map",
                            "-Xlinker",
                            "%{linkmap_exec_path}",
                        ],
                    ),
                ],
            ),
        ],
    )

    set_install_name = feature(
        name = "set_install_name",
        enabled = ctx.fragments.cpp.do_not_use_macos_set_install_name,
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.cpp_link_dynamic_library,
                    ACTION_NAMES.cpp_link_nodeps_dynamic_library,
                ],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-Wl,-install_name,@rpath/%{runtime_solib_name}",
                        ],
                        expand_if_available = "runtime_solib_name",
                    ),
                ],
            ),
        ],
    )

    asan_feature = feature(
        name = "asan",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(flags = ["-fsanitize=address"]),
                ],
                with_features = [
                    with_feature_set(features = ["asan"]),
                ],
            ),
            flag_set(
                actions = [
                    ACTION_NAMES.cpp_link_executable,
                    ACTION_NAMES.cpp_link_dynamic_library,
                    ACTION_NAMES.cpp_link_nodeps_dynamic_library,
                    ACTION_NAMES.objc_executable,
                    ACTION_NAMES.objcpp_executable,
                ],
                flag_groups = [
                    flag_group(flags = ["-fsanitize=address"]),
                ],
                with_features = [
                    with_feature_set(features = ["asan"]),
                ],
            ),
        ],
    )

    tsan_feature = feature(
        name = "tsan",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(flags = ["-fsanitize=thread"]),
                ],
                with_features = [
                    with_feature_set(features = ["tsan"]),
                ],
            ),
            flag_set(
                actions = [
                    ACTION_NAMES.cpp_link_executable,
                    ACTION_NAMES.cpp_link_dynamic_library,
                    ACTION_NAMES.cpp_link_nodeps_dynamic_library,
                    ACTION_NAMES.objc_executable,
                    ACTION_NAMES.objcpp_executable,
                ],
                flag_groups = [
                    flag_group(flags = ["-fsanitize=thread"]),
                ],
                with_features = [
                    with_feature_set(features = ["tsan"]),
                ],
            ),
        ],
    )

    ubsan_feature = feature(
        name = "ubsan",
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(flags = ["-fsanitize=undefined"]),
                ],
                with_features = [
                    with_feature_set(features = ["ubsan"]),
                ],
            ),
            flag_set(
                actions = [
                    ACTION_NAMES.cpp_link_executable,
                    ACTION_NAMES.cpp_link_dynamic_library,
                    ACTION_NAMES.cpp_link_nodeps_dynamic_library,
                    ACTION_NAMES.objc_executable,
                    ACTION_NAMES.objcpp_executable,
                ],
                flag_groups = [
                    flag_group(flags = ["-fsanitize=undefined"]),
                ],
                with_features = [
                    with_feature_set(features = ["ubsan"]),
                ],
            ),
        ],
    )

    default_sanitizer_flags_feature = feature(
        name = "default_sanitizer_flags",
        enabled = True,
        flag_sets = [
            flag_set(
                actions = [
                    ACTION_NAMES.c_compile,
                    ACTION_NAMES.cpp_compile,
                    ACTION_NAMES.objc_compile,
                    ACTION_NAMES.objcpp_compile,
                ],
                flag_groups = [
                    flag_group(
                        flags = [
                            "-gline-tables-only",
                            "-fno-omit-frame-pointer",
                            "-fno-sanitize-recover=all",
                        ],
                    ),
                ],
                with_features = [
                    with_feature_set(features = ["asan"]),
                    with_feature_set(features = ["tsan"]),
                    with_feature_set(features = ["ubsan"]),
                ],
            ),
        ],
    )

    archive_param_file_feature = feature(name = "archive_param_file")

    if (ctx.attr.cpu == "ios_arm64" or
        ctx.attr.cpu == "ios_arm64e" or
        ctx.attr.cpu == "ios_armv7" or
        ctx.attr.cpu == "ios_i386" or
        ctx.attr.cpu == "ios_x86_64" or
        ctx.attr.cpu == "ios_sim_arm64" or
        ctx.attr.cpu == "tvos_arm64" or
        ctx.attr.cpu == "tvos_x86_64" or
        ctx.attr.cpu == "tvos_sim_arm64" or
        ctx.attr.cpu == "watchos_arm64_32" or
        ctx.attr.cpu == "watchos_armv7k" or
        ctx.attr.cpu == "watchos_i386" or
        ctx.attr.cpu == "watchos_x86_64" or
        ctx.attr.cpu == "watchos_arm64"):
        features = [
            fastbuild_feature,
            no_legacy_features_feature,
            opt_feature,
            dbg_feature,
            link_libcpp_feature,
            compile_all_modules_feature,
            exclude_private_headers_in_module_maps_feature,
            has_configured_linker_path_feature,
            only_doth_headers_in_module_maps_feature,
            default_compile_flags_feature,
            debug_prefix_map_pwd_is_dot_feature,
            remap_xcode_path_feature,
            generate_dsym_file_feature,
            generate_linkmap_feature,
            oso_prefix_feature,
            contains_objc_source_feature,
            objc_actions_feature,
            strip_debug_symbols_feature,
            symbol_counts_feature,
            shared_flag_feature,
            kernel_extension_feature,
            linkstamps_feature,
            output_execpath_flags_feature,
            archiver_flags_feature,
            runtime_root_flags_feature,
            input_param_flags_feature,
            force_pic_flags_feature,
            pch_feature,
            module_maps_feature,
            apply_default_warnings_feature,
            includes_feature,
            include_paths_feature,
            sysroot_feature,
            dependency_file_feature,
            serialized_diagnostics_file_feature,
            pic_feature,
            per_object_debug_info_feature,
            preprocessor_defines_feature,
            framework_paths_feature,
            random_seed_feature,
            fdo_instrument_feature,
            fdo_optimize_feature,
            autofdo_feature,
            lipo_feature,
            coverage_feature,
            llvm_coverage_map_format_feature,
            gcc_coverage_map_format_feature,
            apply_default_compiler_flags_feature,
            include_system_dirs_feature,
            headerpad_feature,
            bitcode_embedded_feature,
            bitcode_embedded_markers_feature,
            objc_arc_feature,
            no_objc_arc_feature,
            apple_env_feature,
            relative_ast_path_feature,
            user_link_flags_feature,
            default_link_flags_feature,
            no_deduplicate_feature,
            dead_strip_feature,
            cpp_linker_flags_feature,
            apply_implicit_frameworks_feature,
            link_cocoa_feature,
            apply_simulator_compiler_flags_feature,
            unfiltered_cxx_flags_feature,
            user_compile_flags_feature,
            unfiltered_compile_flags_feature,
            linker_param_file_feature,
            compiler_input_flags_feature,
            compiler_output_flags_feature,
            objcopy_embed_flags_feature,
            set_install_name,
            asan_feature,
            tsan_feature,
            ubsan_feature,
            default_sanitizer_flags_feature,
            archive_param_file_feature,
        ]
    elif (ctx.attr.cpu == "darwin_x86_64" or
          ctx.attr.cpu == "darwin_arm64" or
          ctx.attr.cpu == "darwin_arm64e"):
        features = [
            fastbuild_feature,
            no_legacy_features_feature,
            opt_feature,
            dbg_feature,
            link_libcpp_feature,
            compile_all_modules_feature,
            exclude_private_headers_in_module_maps_feature,
            has_configured_linker_path_feature,
            only_doth_headers_in_module_maps_feature,
            default_compile_flags_feature,
            debug_prefix_map_pwd_is_dot_feature,
            remap_xcode_path_feature,
            generate_dsym_file_feature,
            generate_linkmap_feature,
            oso_prefix_feature,
            contains_objc_source_feature,
            objc_actions_feature,
            strip_debug_symbols_feature,
            symbol_counts_feature,
            shared_flag_feature,
            kernel_extension_feature,
            linkstamps_feature,
            output_execpath_flags_feature,
            archiver_flags_feature,
            runtime_root_flags_feature,
            input_param_flags_feature,
            force_pic_flags_feature,
            pch_feature,
            module_maps_feature,
            apply_default_warnings_feature,
            includes_feature,
            include_paths_feature,
            sysroot_feature,
            dependency_file_feature,
            serialized_diagnostics_file_feature,
            pic_feature,
            per_object_debug_info_feature,
            preprocessor_defines_feature,
            framework_paths_feature,
            random_seed_feature,
            fdo_instrument_feature,
            fdo_optimize_feature,
            autofdo_feature,
            lipo_feature,
            coverage_feature,
            llvm_coverage_map_format_feature,
            gcc_coverage_map_format_feature,
            apply_default_compiler_flags_feature,
            include_system_dirs_feature,
            headerpad_feature,
            bitcode_embedded_feature,
            bitcode_embedded_markers_feature,
            objc_arc_feature,
            no_objc_arc_feature,
            apple_env_feature,
            relative_ast_path_feature,
            user_link_flags_feature,
            default_link_flags_feature,
            no_deduplicate_feature,
            dead_strip_feature,
            cpp_linker_flags_feature,
            apply_implicit_frameworks_feature,
            link_cocoa_feature,
            apply_simulator_compiler_flags_feature,
            unfiltered_cxx_flags_feature,
            user_compile_flags_feature,
            unfiltered_compile_flags_feature,
            linker_param_file_feature,
            compiler_input_flags_feature,
            compiler_output_flags_feature,
            objcopy_embed_flags_feature,
            dynamic_linking_mode_feature,
            set_install_name,
            asan_feature,
            tsan_feature,
            ubsan_feature,
            default_sanitizer_flags_feature,
            archive_param_file_feature,
        ]
    else:
        fail("Unreachable")

    # macOS artifact name patterns differ from the defaults only for dynamic
    # libraries.
    artifact_name_patterns = [
        artifact_name_pattern(
            category_name = "dynamic_library",
            prefix = "lib",
            extension = ".dylib",
        ),
    ]

    make_variables = [
        make_variable(
            name = "STACK_FRAME_UNLIMITED",
            value = "-Wframe-larger-than=100000000 -Wno-vla",
        ),
    ]

    tool_paths = {
        "ar": "libtool",
        "cpp": "/usr/bin/cpp",
        "dwp": "/usr/bin/dwp",
        "gcc": "cc_wrapper.sh",
        "gcov": "/usr/bin/gcov",
        "ld": "/usr/bin/ld",
        "nm": "/usr/bin/nm",
        "objcopy": "/usr/bin/objcopy",
        "objdump": "/usr/bin/objdump",
        "strip": "/usr/bin/strip",
    }

    tool_paths.update(ctx.attr.tool_paths_overrides)

    out = ctx.actions.declare_file(ctx.label.name)
    ctx.actions.write(out, "Fake executable")
    return [
        cc_common.create_cc_toolchain_config_info(
            ctx = ctx,
            features = features,
            action_configs = action_configs,
            artifact_name_patterns = artifact_name_patterns,
            cxx_builtin_include_directories = ctx.attr.cxx_builtin_include_directories,
            toolchain_identifier = ctx.attr.cpu,
            host_system_name = host_system_name,
            target_system_name = target_system_name,
            target_cpu = ctx.attr.cpu,
            target_libc = target_libc,
            compiler = ctx.attr.compiler,
            abi_version = abi_version,
            abi_libc_version = abi_libc_version,
            tool_paths = [tool_path(name = name, path = path) for (name, path) in tool_paths.items()],
            make_variables = make_variables,
            builtin_sysroot = None,
            cc_target_os = "apple",
        ),
        DefaultInfo(
            executable = out,
        ),
    ]

cc_toolchain_config = rule(
    implementation = _impl,
    attrs = {
        "cpu": attr.string(mandatory = True),
        "compiler": attr.string(),
        "cxx_builtin_include_directories": attr.string_list(),
        "tool_paths_overrides": attr.string_dict(),
        "extra_env": attr.string_dict(),
        "_xcode_config": attr.label(default = configuration_field(
            fragment = "apple",
            name = "xcode_config_label",
        )),
    },
    provides = [CcToolchainConfigInfo],
    executable = True,
    fragments = ["apple", "cpp"],
)