Path: blob/trunk/common/remote-build/cc/cc_toolchain_config.bzl
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# 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 Starlark cc_toolchain configuration rule"""
load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES")
load(
"@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl",
"action_config",
"artifact_name_pattern",
"feature",
"feature_set",
"flag_group",
"flag_set",
"tool",
"tool_path",
"variable_with_value",
"with_feature_set",
)
def layering_check_features(compiler):
if compiler != "clang":
return []
return [
feature(
name = "use_module_maps",
requires = [feature_set(features = ["module_maps"])],
flag_sets = [
flag_set(
actions = [
ACTION_NAMES.c_compile,
ACTION_NAMES.cpp_compile,
ACTION_NAMES.cpp_header_parsing,
ACTION_NAMES.cpp_module_compile,
],
flag_groups = [
flag_group(
flags = [
"-fmodule-name=%{module_name}",
"-fmodule-map-file=%{module_map_file}",
],
),
],
),
],
),
# Tell blaze we support module maps in general, so they will be generated
# for all c/c++ rules.
# Note: not all C++ rules support module maps; thus, do not imply this
# feature from other features - instead, require it.
feature(name = "module_maps", enabled = True),
feature(
name = "layering_check",
implies = ["use_module_maps"],
flag_sets = [
flag_set(
actions = [
ACTION_NAMES.c_compile,
ACTION_NAMES.cpp_compile,
ACTION_NAMES.cpp_header_parsing,
ACTION_NAMES.cpp_module_compile,
],
flag_groups = [
flag_group(flags = [
"-fmodules-strict-decluse",
"-Wprivate-header",
]),
flag_group(
iterate_over = "dependent_module_map_files",
flags = [
"-fmodule-map-file=%{dependent_module_map_files}",
],
),
],
),
],
),
]
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,
]
lto_index_actions = [
ACTION_NAMES.lto_index_for_executable,
ACTION_NAMES.lto_index_for_dynamic_library,
ACTION_NAMES.lto_index_for_nodeps_dynamic_library,
]
def _impl(ctx):
tool_paths = [
tool_path(name = name, path = path)
for name, path in ctx.attr.tool_paths.items()
]
action_configs = []
llvm_cov_action = action_config(
action_name = ACTION_NAMES.llvm_cov,
tools = [
tool(
path = ctx.attr.tool_paths["llvm-cov"],
),
],
)
action_configs.append(llvm_cov_action)
supports_pic_feature = feature(
name = "supports_pic",
enabled = True,
)
supports_start_end_lib_feature = feature(
name = "supports_start_end_lib",
enabled = True,
)
default_compile_flags_feature = feature(
name = "default_compile_flags",
enabled = True,
flag_sets = [
flag_set(
actions = all_compile_actions,
flag_groups = [
flag_group(
# Security hardening requires optimization.
# We need to undef it as some distributions now have it enabled by default.
flags = ["-U_FORTIFY_SOURCE"],
),
],
with_features = [
with_feature_set(
not_features = ["thin_lto"],
),
],
),
flag_set(
actions = all_compile_actions,
flag_groups = ([
flag_group(
flags = ctx.attr.compile_flags,
),
] if ctx.attr.compile_flags else []),
),
flag_set(
actions = all_compile_actions,
flag_groups = ([
flag_group(
flags = ctx.attr.dbg_compile_flags,
),
] if ctx.attr.dbg_compile_flags else []),
with_features = [with_feature_set(features = ["dbg"])],
),
flag_set(
actions = all_compile_actions,
flag_groups = ([
flag_group(
flags = ctx.attr.opt_compile_flags,
),
] if ctx.attr.opt_compile_flags else []),
with_features = [with_feature_set(features = ["opt"])],
),
flag_set(
actions = all_cpp_compile_actions + [ACTION_NAMES.lto_backend],
flag_groups = ([
flag_group(
flags = ctx.attr.cxx_flags,
),
] if ctx.attr.cxx_flags else []),
),
],
)
default_link_flags_feature = feature(
name = "default_link_flags",
enabled = True,
flag_sets = [
flag_set(
actions = all_link_actions + lto_index_actions,
flag_groups = ([
flag_group(
flags = ctx.attr.link_flags,
),
] if ctx.attr.link_flags else []),
),
flag_set(
actions = all_link_actions + lto_index_actions,
flag_groups = ([
flag_group(
flags = ctx.attr.opt_link_flags,
),
] if ctx.attr.opt_link_flags else []),
with_features = [with_feature_set(features = ["opt"])],
),
],
)
dbg_feature = feature(name = "dbg")
opt_feature = feature(name = "opt")
sysroot_feature = feature(
name = "sysroot",
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.cpp_module_codegen,
ACTION_NAMES.lto_backend,
ACTION_NAMES.clif_match,
] + all_link_actions + lto_index_actions,
flag_groups = [
flag_group(
flags = ["--sysroot=%{sysroot}"],
expand_if_available = "sysroot",
),
],
),
],
)
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}",
"-fprofile-correction",
],
expand_if_available = "fdo_profile_path",
),
],
),
],
provides = ["profile"],
)
supports_dynamic_linker_feature = feature(name = "supports_dynamic_linker", enabled = True)
user_compile_flags_feature = feature(
name = "user_compile_flags",
enabled = True,
flag_sets = [
flag_set(
actions = all_compile_actions,
flag_groups = [
flag_group(
flags = ["%{user_compile_flags}"],
iterate_over = "user_compile_flags",
expand_if_available = "user_compile_flags",
),
],
),
],
)
unfiltered_compile_flags_feature = feature(
name = "unfiltered_compile_flags",
enabled = True,
flag_sets = [
flag_set(
actions = all_compile_actions,
flag_groups = ([
flag_group(
flags = ctx.attr.unfiltered_compile_flags,
),
] if ctx.attr.unfiltered_compile_flags else []),
),
],
)
library_search_directories_feature = feature(
name = "library_search_directories",
flag_sets = [
flag_set(
actions = all_link_actions + lto_index_actions,
flag_groups = [
flag_group(
flags = ["-L%{library_search_directories}"],
iterate_over = "library_search_directories",
expand_if_available = "library_search_directories",
),
],
),
],
)
static_libgcc_feature = feature(
name = "static_libgcc",
enabled = True,
flag_sets = [
flag_set(
actions = [
ACTION_NAMES.cpp_link_executable,
ACTION_NAMES.cpp_link_dynamic_library,
ACTION_NAMES.lto_index_for_executable,
ACTION_NAMES.lto_index_for_dynamic_library,
],
flag_groups = [flag_group(flags = ["-static-libgcc"])],
with_features = [
with_feature_set(features = ["static_link_cpp_runtimes"]),
],
),
],
)
pic_feature = feature(
name = "pic",
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_module_codegen,
ACTION_NAMES.cpp_module_compile,
],
flag_groups = [
flag_group(flags = ["-fPIC"], expand_if_available = "pic"),
],
),
],
)
per_object_debug_info_feature = feature(
name = "per_object_debug_info",
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_codegen,
],
flag_groups = [
flag_group(
flags = ["-gsplit-dwarf", "-g"],
expand_if_available = "per_object_debug_info_file",
),
],
),
],
)
preprocessor_defines_feature = feature(
name = "preprocessor_defines",
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.clif_match,
],
flag_groups = [
flag_group(
flags = ["-D%{preprocessor_defines}"],
iterate_over = "preprocessor_defines",
),
],
),
],
)
cs_fdo_optimize_feature = feature(
name = "cs_fdo_optimize",
flag_sets = [
flag_set(
actions = [ACTION_NAMES.lto_backend],
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 = ["csprofile"],
)
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"],
)
runtime_library_search_directories_feature = feature(
name = "runtime_library_search_directories",
flag_sets = [
flag_set(
actions = all_link_actions + lto_index_actions,
flag_groups = [
flag_group(
iterate_over = "runtime_library_search_directories",
flag_groups = [
flag_group(
flags = [
"-Xlinker",
"-rpath",
"-Xlinker",
"$EXEC_ORIGIN/%{runtime_library_search_directories}",
],
expand_if_true = "is_cc_test",
),
flag_group(
flags = [
"-Xlinker",
"-rpath",
"-Xlinker",
"$ORIGIN/%{runtime_library_search_directories}",
],
expand_if_false = "is_cc_test",
),
],
expand_if_available =
"runtime_library_search_directories",
),
],
with_features = [
with_feature_set(features = ["static_link_cpp_runtimes"]),
],
),
flag_set(
actions = all_link_actions + lto_index_actions,
flag_groups = [
flag_group(
iterate_over = "runtime_library_search_directories",
flag_groups = [
flag_group(
flags = [
"-Xlinker",
"-rpath",
"-Xlinker",
"$ORIGIN/%{runtime_library_search_directories}",
],
),
],
expand_if_available =
"runtime_library_search_directories",
),
],
with_features = [
with_feature_set(
not_features = ["static_link_cpp_runtimes"],
),
],
),
],
)
fission_support_feature = feature(
name = "fission_support",
flag_sets = [
flag_set(
actions = all_link_actions + lto_index_actions,
flag_groups = [
flag_group(
flags = ["-Wl,--gdb-index"],
expand_if_available = "is_using_fission",
),
],
),
],
)
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,
ACTION_NAMES.lto_index_for_dynamic_library,
ACTION_NAMES.lto_index_for_nodeps_dynamic_library,
],
flag_groups = [flag_group(flags = ["-shared"])],
),
],
)
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",
),
],
),
],
)
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.clif_match,
ACTION_NAMES.objc_compile,
ACTION_NAMES.objcpp_compile,
],
flag_groups = [
flag_group(
flags = ["-include", "%{includes}"],
iterate_over = "includes",
expand_if_available = "includes",
),
],
),
],
)
fdo_instrument_feature = feature(
name = "fdo_instrument",
flag_sets = [
flag_set(
actions = [
ACTION_NAMES.c_compile,
ACTION_NAMES.cpp_compile,
] + all_link_actions + lto_index_actions,
flag_groups = [
flag_group(
flags = [
"-fprofile-generate=%{fdo_instrument_path}",
"-fno-data-sections",
],
expand_if_available = "fdo_instrument_path",
),
],
),
],
provides = ["profile"],
)
cs_fdo_instrument_feature = feature(
name = "cs_fdo_instrument",
flag_sets = [
flag_set(
actions = [
ACTION_NAMES.c_compile,
ACTION_NAMES.cpp_compile,
ACTION_NAMES.lto_backend,
] + all_link_actions + lto_index_actions,
flag_groups = [
flag_group(
flags = [
"-fcs-profile-generate=%{cs_fdo_instrument_path}",
],
expand_if_available = "cs_fdo_instrument_path",
),
],
),
],
provides = ["csprofile"],
)
include_paths_feature = feature(
name = "include_paths",
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.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",
),
],
),
],
)
external_include_paths_feature = feature(
name = "external_include_paths",
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.clif_match,
ACTION_NAMES.objc_compile,
ACTION_NAMES.objcpp_compile,
],
flag_groups = [
flag_group(
flags = ["-isystem", "%{external_include_paths}"],
iterate_over = "external_include_paths",
expand_if_available = "external_include_paths",
),
],
),
],
)
symbol_counts_feature = feature(
name = "symbol_counts",
flag_sets = [
flag_set(
actions = all_link_actions + lto_index_actions,
flag_groups = [
flag_group(
flags = [
"-Wl,--print-symbol-counts=%{symbol_counts_output}",
],
expand_if_available = "symbol_counts_output",
),
],
),
],
)
strip_debug_symbols_feature = feature(
name = "strip_debug_symbols",
flag_sets = [
flag_set(
actions = all_link_actions + lto_index_actions,
flag_groups = [
flag_group(
flags = ["-Wl,-S"],
expand_if_available = "strip_debug_symbols",
),
],
),
],
)
build_interface_libraries_feature = feature(
name = "build_interface_libraries",
flag_sets = [
flag_set(
actions = [
ACTION_NAMES.cpp_link_dynamic_library,
ACTION_NAMES.cpp_link_nodeps_dynamic_library,
ACTION_NAMES.lto_index_for_dynamic_library,
ACTION_NAMES.lto_index_for_nodeps_dynamic_library,
],
flag_groups = [
flag_group(
flags = [
"%{generate_interface_library}",
"%{interface_library_builder_path}",
"%{interface_library_input_path}",
"%{interface_library_output_path}",
],
expand_if_available = "generate_interface_library",
),
],
with_features = [
with_feature_set(
features = ["supports_interface_shared_libraries"],
),
],
),
],
)
libraries_to_link_feature = feature(
name = "libraries_to_link",
flag_sets = [
flag_set(
actions = all_link_actions + lto_index_actions,
flag_groups = [
flag_group(
iterate_over = "libraries_to_link",
flag_groups = [
flag_group(
flags = ["-Wl,--start-lib"],
expand_if_equal = variable_with_value(
name = "libraries_to_link.type",
value = "object_file_group",
),
),
flag_group(
flags = ["-Wl,-whole-archive"],
expand_if_true =
"libraries_to_link.is_whole_archive",
),
flag_group(
flags = ["%{libraries_to_link.object_files}"],
iterate_over = "libraries_to_link.object_files",
expand_if_equal = variable_with_value(
name = "libraries_to_link.type",
value = "object_file_group",
),
),
flag_group(
flags = ["%{libraries_to_link.name}"],
expand_if_equal = variable_with_value(
name = "libraries_to_link.type",
value = "object_file",
),
),
flag_group(
flags = ["%{libraries_to_link.name}"],
expand_if_equal = variable_with_value(
name = "libraries_to_link.type",
value = "interface_library",
),
),
flag_group(
flags = ["%{libraries_to_link.name}"],
expand_if_equal = variable_with_value(
name = "libraries_to_link.type",
value = "static_library",
),
),
flag_group(
flags = ["-l%{libraries_to_link.name}"],
expand_if_equal = variable_with_value(
name = "libraries_to_link.type",
value = "dynamic_library",
),
),
flag_group(
flags = ["-l:%{libraries_to_link.name}"],
expand_if_equal = variable_with_value(
name = "libraries_to_link.type",
value = "versioned_dynamic_library",
),
),
flag_group(
flags = ["-Wl,-no-whole-archive"],
expand_if_true = "libraries_to_link.is_whole_archive",
),
flag_group(
flags = ["-Wl,--end-lib"],
expand_if_equal = variable_with_value(
name = "libraries_to_link.type",
value = "object_file_group",
),
),
],
expand_if_available = "libraries_to_link",
),
flag_group(
flags = ["-Wl,@%{thinlto_param_file}"],
expand_if_true = "thinlto_param_file",
),
],
),
],
)
user_link_flags_feature = feature(
name = "user_link_flags",
flag_sets = [
flag_set(
actions = all_link_actions + lto_index_actions,
flag_groups = [
flag_group(
flags = ["%{user_link_flags}"],
iterate_over = "user_link_flags",
expand_if_available = "user_link_flags",
),
],
),
],
)
default_link_libs_feature = feature(
name = "default_link_libs",
enabled = True,
flag_sets = [
flag_set(
actions = all_link_actions + lto_index_actions,
flag_groups = [flag_group(flags = ctx.attr.link_libs)] if ctx.attr.link_libs else [],
),
],
)
fdo_prefetch_hints_feature = feature(
name = "fdo_prefetch_hints",
flag_sets = [
flag_set(
actions = [
ACTION_NAMES.c_compile,
ACTION_NAMES.cpp_compile,
ACTION_NAMES.lto_backend,
],
flag_groups = [
flag_group(
flags = [
"-mllvm",
"-prefetch-hints-file=%{fdo_prefetch_hints_path}",
],
expand_if_available = "fdo_prefetch_hints_path",
),
],
),
],
)
linkstamps_feature = feature(
name = "linkstamps",
flag_sets = [
flag_set(
actions = all_link_actions + lto_index_actions,
flag_groups = [
flag_group(
flags = ["%{linkstamp_paths}"],
iterate_over = "linkstamp_paths",
expand_if_available = "linkstamp_paths",
),
],
),
],
)
archiver_flags_feature = feature(
name = "archiver_flags",
flag_sets = [
flag_set(
actions = [ACTION_NAMES.cpp_link_static_library],
flag_groups = [
flag_group(flags = ["rcsD"]),
flag_group(
flags = ["%{output_execpath}"],
expand_if_available = "output_execpath",
),
],
with_features = [
with_feature_set(
not_features = ["libtool"],
),
],
),
flag_set(
actions = [ACTION_NAMES.cpp_link_static_library],
flag_groups = [
flag_group(flags = ["-static", "-s"]),
flag_group(
flags = ["-o", "%{output_execpath}"],
expand_if_available = "output_execpath",
),
],
with_features = [
with_feature_set(
features = ["libtool"],
),
],
),
flag_set(
actions = [ACTION_NAMES.cpp_link_static_library],
flag_groups = [
flag_group(
iterate_over = "libraries_to_link",
flag_groups = [
flag_group(
flags = ["%{libraries_to_link.name}"],
expand_if_equal = variable_with_value(
name = "libraries_to_link.type",
value = "object_file",
),
),
flag_group(
flags = ["%{libraries_to_link.object_files}"],
iterate_over = "libraries_to_link.object_files",
expand_if_equal = variable_with_value(
name = "libraries_to_link.type",
value = "object_file_group",
),
),
],
expand_if_available = "libraries_to_link",
),
],
),
flag_set(
actions = [ACTION_NAMES.cpp_link_static_library],
flag_groups = ([
flag_group(
flags = ctx.attr.archive_flags,
),
] if ctx.attr.archive_flags else []),
),
],
)
force_pic_flags_feature = feature(
name = "force_pic_flags",
flag_sets = [
flag_set(
actions = [
ACTION_NAMES.cpp_link_executable,
ACTION_NAMES.lto_index_for_executable,
],
flag_groups = [
flag_group(
flags = ["-pie"],
expand_if_available = "force_pic",
),
],
),
],
)
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,
ACTION_NAMES.clif_match,
],
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,
ACTION_NAMES.clif_match,
],
flag_groups = [
flag_group(
flags = ["--serialize-diagnostics", "%{serialized_diagnostics_file}"],
expand_if_available = "serialized_diagnostics_file",
),
],
),
],
)
dynamic_library_linker_tool_feature = feature(
name = "dynamic_library_linker_tool",
flag_sets = [
flag_set(
actions = [
ACTION_NAMES.cpp_link_dynamic_library,
ACTION_NAMES.cpp_link_nodeps_dynamic_library,
ACTION_NAMES.lto_index_for_dynamic_library,
ACTION_NAMES.lto_index_for_nodeps_dynamic_library,
],
flag_groups = [
flag_group(
flags = [" + cppLinkDynamicLibraryToolPath + "],
expand_if_available = "generate_interface_library",
),
],
with_features = [
with_feature_set(
features = ["supports_interface_shared_libraries"],
),
],
),
],
)
output_execpath_flags_feature = feature(
name = "output_execpath_flags",
flag_sets = [
flag_set(
actions = all_link_actions + lto_index_actions,
flag_groups = [
flag_group(
flags = ["-o", "%{output_execpath}"],
expand_if_available = "output_execpath",
),
],
),
],
)
# Note that we also set --coverage for c++-link-nodeps-dynamic-library. The
# generated code contains references to gcov symbols, and the dynamic linker
# can't resolve them unless the library is linked against gcov.
coverage_feature = feature(
name = "coverage",
provides = ["profile"],
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,
],
flag_groups = ([
flag_group(flags = ctx.attr.coverage_compile_flags),
] if ctx.attr.coverage_compile_flags else []),
),
flag_set(
actions = all_link_actions + lto_index_actions,
flag_groups = ([
flag_group(flags = ctx.attr.coverage_link_flags),
] if ctx.attr.coverage_link_flags else []),
),
],
)
thinlto_feature = feature(
name = "thin_lto",
flag_sets = [
flag_set(
actions = [
ACTION_NAMES.c_compile,
ACTION_NAMES.cpp_compile,
] + all_link_actions + lto_index_actions,
flag_groups = [
flag_group(flags = ["-flto=thin"]),
flag_group(
expand_if_available = "lto_indexing_bitcode_file",
flags = [
"-Xclang",
"-fthin-link-bitcode=%{lto_indexing_bitcode_file}",
],
),
],
),
flag_set(
actions = [ACTION_NAMES.linkstamp_compile],
flag_groups = [flag_group(flags = ["-DBUILD_LTO_TYPE=thin"])],
),
flag_set(
actions = lto_index_actions,
flag_groups = [
flag_group(flags = [
"-flto=thin",
"-Wl,-plugin-opt,thinlto-index-only%{thinlto_optional_params_file}",
"-Wl,-plugin-opt,thinlto-emit-imports-files",
"-Wl,-plugin-opt,thinlto-prefix-replace=%{thinlto_prefix_replace}",
]),
flag_group(
expand_if_available = "thinlto_object_suffix_replace",
flags = [
"-Wl,-plugin-opt,thinlto-object-suffix-replace=%{thinlto_object_suffix_replace}",
],
),
flag_group(
expand_if_available = "thinlto_merged_object_file",
flags = [
"-Wl,-plugin-opt,obj-path=%{thinlto_merged_object_file}",
],
),
],
),
flag_set(
actions = [ACTION_NAMES.lto_backend],
flag_groups = [
flag_group(flags = [
"-c",
"-fthinlto-index=%{thinlto_index}",
"-o",
"%{thinlto_output_object_file}",
"-x",
"ir",
"%{thinlto_input_bitcode_file}",
]),
],
),
],
)
treat_warnings_as_errors_feature = feature(
name = "treat_warnings_as_errors",
flag_sets = [
flag_set(
actions = [ACTION_NAMES.c_compile, ACTION_NAMES.cpp_compile],
flag_groups = [flag_group(flags = ["-Werror"])],
),
flag_set(
actions = all_link_actions,
flag_groups = [flag_group(flags = ["-Wl,-fatal-warnings"])],
),
],
)
archive_param_file_feature = feature(
name = "archive_param_file",
enabled = True,
)
is_linux = ctx.attr.target_libc != "macosx"
libtool_feature = feature(
name = "libtool",
enabled = not is_linux,
)
# TODO(#8303): Mac crosstool should also declare every feature.
if is_linux:
# Linux artifact name patterns are the default.
artifact_name_patterns = []
features = [
dependency_file_feature,
serialized_diagnostics_file_feature,
random_seed_feature,
pic_feature,
per_object_debug_info_feature,
preprocessor_defines_feature,
includes_feature,
include_paths_feature,
external_include_paths_feature,
fdo_instrument_feature,
cs_fdo_instrument_feature,
cs_fdo_optimize_feature,
thinlto_feature,
fdo_prefetch_hints_feature,
autofdo_feature,
build_interface_libraries_feature,
dynamic_library_linker_tool_feature,
symbol_counts_feature,
shared_flag_feature,
linkstamps_feature,
output_execpath_flags_feature,
runtime_library_search_directories_feature,
library_search_directories_feature,
libtool_feature,
archiver_flags_feature,
force_pic_flags_feature,
fission_support_feature,
strip_debug_symbols_feature,
coverage_feature,
supports_pic_feature,
] + (
[
supports_start_end_lib_feature,
] if ctx.attr.supports_start_end_lib else []
) + [
default_compile_flags_feature,
default_link_flags_feature,
libraries_to_link_feature,
user_link_flags_feature,
default_link_libs_feature,
static_libgcc_feature,
fdo_optimize_feature,
supports_dynamic_linker_feature,
dbg_feature,
opt_feature,
user_compile_flags_feature,
sysroot_feature,
unfiltered_compile_flags_feature,
treat_warnings_as_errors_feature,
archive_param_file_feature,
] + layering_check_features(ctx.attr.compiler)
else:
# 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",
),
]
features = [
libtool_feature,
archiver_flags_feature,
supports_pic_feature,
] + (
[
supports_start_end_lib_feature,
] if ctx.attr.supports_start_end_lib else []
) + [
coverage_feature,
default_compile_flags_feature,
default_link_flags_feature,
user_link_flags_feature,
default_link_libs_feature,
fdo_optimize_feature,
supports_dynamic_linker_feature,
dbg_feature,
opt_feature,
user_compile_flags_feature,
sysroot_feature,
unfiltered_compile_flags_feature,
treat_warnings_as_errors_feature,
archive_param_file_feature,
] + layering_check_features(ctx.attr.compiler)
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.toolchain_identifier,
host_system_name = ctx.attr.host_system_name,
target_system_name = ctx.attr.target_system_name,
target_cpu = ctx.attr.cpu,
target_libc = ctx.attr.target_libc,
compiler = ctx.attr.compiler,
abi_version = ctx.attr.abi_version,
abi_libc_version = ctx.attr.abi_libc_version,
tool_paths = tool_paths,
builtin_sysroot = ctx.attr.builtin_sysroot,
)
cc_toolchain_config = rule(
implementation = _impl,
attrs = {
"cpu": attr.string(mandatory = True),
"compiler": attr.string(mandatory = True),
"toolchain_identifier": attr.string(mandatory = True),
"host_system_name": attr.string(mandatory = True),
"target_system_name": attr.string(mandatory = True),
"target_libc": attr.string(mandatory = True),
"abi_version": attr.string(mandatory = True),
"abi_libc_version": attr.string(mandatory = True),
"cxx_builtin_include_directories": attr.string_list(),
"tool_paths": attr.string_dict(),
"compile_flags": attr.string_list(),
"dbg_compile_flags": attr.string_list(),
"opt_compile_flags": attr.string_list(),
"cxx_flags": attr.string_list(),
"link_flags": attr.string_list(),
"archive_flags": attr.string_list(),
"link_libs": attr.string_list(),
"opt_link_flags": attr.string_list(),
"unfiltered_compile_flags": attr.string_list(),
"coverage_compile_flags": attr.string_list(),
"coverage_link_flags": attr.string_list(),
"supports_start_end_lib": attr.bool(),
"builtin_sysroot": attr.string(),
},
provides = [CcToolchainConfigInfo],
)