# 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/cpp:cc_toolchain_config_lib.bzl", "action_config", "feature", "feature_set", "flag_group", "flag_set", "tool", "tool_path", "variable_with_value", "with_feature_set", ) load("@bazel_tools//tools/build_defs/cc:action_names.bzl", "ACTION_NAMES") 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( 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", 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"], 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 = [ "-Wl,-rpath,$EXEC_ORIGIN/%{runtime_library_search_directories}", ], expand_if_true = "is_cc_test", ), flag_group( flags = [ "-Wl,-rpath,$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 = [ "-Wl,-rpath,$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", ), ], ), ], ) 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", ), ], ), ], ) 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", ], ), ], ), flag_set( actions = all_link_actions + lto_index_actions + [ "objc-executable", "objc++-executable", ], flag_groups = [ flag_group(flags = ["-fprofile-instr-generate"]), ], ), ], requires = [feature_set(features = ["coverage"])], provides = ["profile"], ) 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", ), ] + ([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", ), ], ), ], ) 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, "objc-executable", "objc++-executable", ], flag_groups = [ flag_group( flags = ["-fprofile-arcs", "-ftest-coverage"], expand_if_available = "gcov_gcno_file", ), ], ), flag_set( actions = all_link_actions + lto_index_actions, flag_groups = [flag_group(flags = ["--coverage"])], ), ], requires = [feature_set(features = ["coverage"])], provides = ["profile"], ) 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", ), ], ), 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", ), ], ), ], ) 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", ), ], ), ], ) dynamic_library_linker_tool_path = tool_paths 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}", ]), ], ), ], ) is_linux = ctx.attr.target_libc != "macosx" # TODO(#8303): Mac crosstool should also declare every feature. if is_linux: features = [ dependency_file_feature, random_seed_feature, pic_feature, per_object_debug_info_feature, preprocessor_defines_feature, includes_feature, 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, 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, static_libgcc_feature, fdo_optimize_feature, supports_dynamic_linker_feature, dbg_feature, opt_feature, user_compile_flags_feature, sysroot_feature, unfiltered_compile_flags_feature, ] + layering_check_features(ctx.attr.compiler) else: features = [ 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, fdo_optimize_feature, supports_dynamic_linker_feature, dbg_feature, opt_feature, user_compile_flags_feature, sysroot_feature, unfiltered_compile_flags_feature, ] + layering_check_features(ctx.attr.compiler) return cc_common.create_cc_toolchain_config_info( ctx = ctx, features = features, action_configs = action_configs, 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(), "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], )