Implement Bazel Clang toolchain
This commit is contained in:
596
bazel/clang_toolchain/toolchain_config.bzl
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596
bazel/clang_toolchain/toolchain_config.bzl
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@ -0,0 +1,596 @@
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# Copyright 2025 Steven Le Rouzic
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#
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# SPDX-License-Identifier: BSD-3-Clause
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load(
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"//:clang_config.bzl",
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"CLANG_BINDIR",
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"CLANG_LIBDIR",
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"CLANG_INCLUDE_DIRS",
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)
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load("@rules_cc//cc:action_names.bzl", "ACTION_NAMES")
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load(
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"@rules_cc//cc:cc_toolchain_config_lib.bzl",
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"action_config",
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"artifact_name_pattern",
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"feature",
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"feature_set",
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"flag_group",
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"flag_set",
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"tool",
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"tool_path",
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"variable_with_value",
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)
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CPP_COMPILE_ACTIONS = [
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ACTION_NAMES.cpp_compile,
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ACTION_NAMES.cpp_header_parsing
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]
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C_COMPILE_ACTIONS = [
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ACTION_NAMES.c_compile,
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]
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COMPILE_ACTIONS = C_COMPILE_ACTIONS + CPP_COMPILE_ACTIONS
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LINK_ACTIONS = [
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ACTION_NAMES.cpp_link_dynamic_library,
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ACTION_NAMES.cpp_link_nodeps_dynamic_library,
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ACTION_NAMES.cpp_link_executable,
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]
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ARCHIVE_ACTIONS = [
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ACTION_NAMES.cpp_link_static_library,
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]
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def _impl(ctx):
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os = ctx.attr.os
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is_windows = os == "windows"
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exe_suffix = ".exe" if is_windows else ""
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tool_paths = [
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tool_path(name = "ar", path = CLANG_BINDIR + "/llvm-ar" + exe_suffix),
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tool_path(name = "ld", path = CLANG_BINDIR + "/ld.lld" + exe_suffix),
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tool_path(name = "nm", path = CLANG_BINDIR + "/llvm-nm" + exe_suffix),
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tool_path(name = "objdump", path = CLANG_BINDIR + "/llvm-objdump" + exe_suffix),
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tool_path(name = "strip", path = CLANG_BINDIR + "/llvm-strip" + exe_suffix),
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tool_path(name = "gcc", path = CLANG_BINDIR + "/clang" + exe_suffix),
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tool_path(name = "cpp", path = CLANG_BINDIR + "/clang++" + exe_suffix),
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]
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action_configs = [
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action_config(action_name = name, enabled = True, tools = [tool(path = CLANG_BINDIR + "/clang" + exe_suffix)])
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for name in C_COMPILE_ACTIONS
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] + [
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action_config(action_name = name, enabled = True, tools = [tool(path = CLANG_BINDIR + "/clang++" + exe_suffix)])
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for name in CPP_COMPILE_ACTIONS
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] + [
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action_config(action_name = name, enabled = True, tools = [tool(path = CLANG_BINDIR + "/clang++" + exe_suffix)])
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for name in LINK_ACTIONS
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] + [
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action_config(action_name = name, enabled = True, tools = [tool(path = CLANG_BINDIR + "/llvm-ar" + exe_suffix)])
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for name in ARCHIVE_ACTIONS
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] + [
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action_config(ACTION_NAMES.strip, enabled = True, tools = [tool(path = CLANG_BINDIR + "/llvm-strip" + exe_suffix)]),
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]
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artifact_name_patterns = [
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artifact_name_pattern(
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category_name = "object_file",
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prefix = "",
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extension = ".obj" if is_windows else ".o",
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),
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artifact_name_pattern(
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category_name = "static_library",
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prefix = "" if is_windows else "lib",
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extension = ".lib" if is_windows else ".a",
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),
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artifact_name_pattern(
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category_name = "dynamic_library",
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prefix = "" if is_windows else "lib",
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extension = ".dll" if is_windows else ".so",
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),
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artifact_name_pattern(
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category_name = "executable",
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prefix = "",
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extension = exe_suffix,
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),
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]
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asan_link_flag_sets = []
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ubsan_link_flag_sets = []
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if is_windows:
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asan_link_flag_sets.append(flag_set(
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actions = LINK_ACTIONS,
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flag_groups = [
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flag_group(
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flags = [
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"-l\"" + CLANG_LIBDIR + "/lib/windows/clang_rt.asan_dynamic-x86_64.lib\"",
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],
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),
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],
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))
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ubsan_link_flag_sets.append(flag_set(
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actions = LINK_ACTIONS,
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flag_groups = [
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flag_group(
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flags = [
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"-l\"" + CLANG_LIBDIR + "/lib/windows/clang_rt.ubsan_standalone-x86_64.lib\"",
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],
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),
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],
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))
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features = [
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feature(name = "no_legacy_features"),
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feature(name = "opt"),
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feature(name = "fastbuild"),
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feature(name = "dbg"),
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feature(
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name = "default_flags",
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enabled = True,
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flag_sets = [
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flag_set(
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actions = COMPILE_ACTIONS + LINK_ACTIONS,
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flag_groups = [
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flag_group(
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flags = [
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"-no-canonical-prefixes",
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"-fcolor-diagnostics",
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],
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),
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],
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),
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flag_set(
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actions = LINK_ACTIONS,
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flag_groups = [
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flag_group(
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flags = [
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"-fuse-ld=lld",
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],
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),
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],
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),
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flag_set(
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actions = COMPILE_ACTIONS,
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flag_groups = [
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flag_group(
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flags = [
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"-Wno-builtin-macro-redefined",
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"-D__DATE__=\"redacted\"",
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"-D__TIMESTAMP__=\"redacted\"",
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"-D__TIME__=\"redacted\"",
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"-c",
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],
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),
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flag_group(
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flags = ["-frandom-seed=%{output_file}"],
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expand_if_available = "output_file",
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),
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flag_group(
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flags = ["-D%{preprocessor_defines}"],
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iterate_over = "preprocessor_defines",
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),
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flag_group(
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flags = ["-I%{include_paths}"],
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iterate_over = "include_paths",
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),
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flag_group(
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flags = ["-iquote", "%{quote_include_paths}"],
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iterate_over = "quote_include_paths",
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),
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flag_group(
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flags = ["-isystem", "%{system_include_paths}"],
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iterate_over = "system_include_paths",
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),
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flag_group(
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flags = ["-MD", "-MF", "%{dependency_file}"],
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expand_if_available = "dependency_file",
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),
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],
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),
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flag_set(
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actions = ARCHIVE_ACTIONS,
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flag_groups = [
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flag_group(
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flags = ["rcsD"],
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),
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flag_group(
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flags = ["%{output_execpath}"],
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expand_if_available = "output_execpath",
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),
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],
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),
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flag_set(
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actions = LINK_ACTIONS + ARCHIVE_ACTIONS,
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flag_groups = [
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flag_group(
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iterate_over = "libraries_to_link",
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expand_if_available = "libraries_to_link",
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flag_groups = [
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flag_group(
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flags = ["-Wl,--start-lib"],
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "object_file_group",
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),
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),
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flag_group(
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iterate_over = "libraries_to_link.object_files",
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "object_file_group",
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),
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flag_groups = [
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flag_group(
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flags = ["%{libraries_to_link.object_files}"],
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expand_if_false = "libraries_to_link.is_whole_archive",
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),
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flag_group(
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flags = ["-Wl,-force_load,%{libraries_to_link.object_files}"],
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expand_if_true = "libraries_to_link.is_whole_archive",
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),
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],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "object_file",
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),
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flag_groups = [
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flag_group(
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flags = ["%{libraries_to_link.name}"],
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expand_if_false = "libraries_to_link.is_whole_archive",
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),
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flag_group(
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flags = ["-Wl,-force_load,%{libraries_to_link.name}"],
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expand_if_true = "libraries_to_link.is_whole_archive",
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),
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],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "interface_library",
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),
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flag_groups = [
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flag_group(
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flags = ["%{libraries_to_link.name}"],
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expand_if_false = "libraries_to_link.is_whole_archive",
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),
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flag_group(
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flags = ["-Wl,-force_load,%{libraries_to_link.name}"],
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expand_if_true = "libraries_to_link.is_whole_archive",
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),
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],
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),
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flag_group(
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "static_library",
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),
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flag_groups = [
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flag_group(
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flags = ["%{libraries_to_link.name}"],
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expand_if_false = "libraries_to_link.is_whole_archive",
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),
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flag_group(
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flags = ["-Wl,-force_load,%{libraries_to_link.name}"],
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expand_if_true = "libraries_to_link.is_whole_archive",
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),
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],
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),
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flag_group(
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flags = ["-l%{libraries_to_link.name}"],
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "dynamic_library",
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),
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),
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flag_group(
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flags = ["-l:%{libraries_to_link.name}"],
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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value = "versioned_dynamic_library",
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),
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),
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flag_group(
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expand_if_true = "libraries_to_link.is_whole_archive",
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flag_groups = [
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flag_group(
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expand_if_false = "macos_flags",
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flags = ["-Wl,-no-whole-archive"],
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),
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],
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),
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flag_group(
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flags = ["-Wl,--end-lib"],
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expand_if_equal = variable_with_value(
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name = "libraries_to_link.type",
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||||
value = "object_file_group",
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||||
),
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||||
),
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],
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),
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],
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),
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],
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),
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feature(
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name = "windows_linker_flags",
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enabled = is_windows,
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flag_sets = [
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flag_set(
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actions = LINK_ACTIONS,
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flag_groups = [
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flag_group(
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flags = [
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||||
"-Xlinker",
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"/subsystem:console",
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],
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||||
),
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||||
],
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||||
),
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||||
],
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),
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feature(
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name = "dbg_flags",
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enabled = True,
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||||
requires = [feature_set(["dbg"])],
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flag_sets = [
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||||
flag_set(
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||||
actions = COMPILE_ACTIONS,
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||||
flag_groups = [
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||||
flag_group(
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||||
flags = [
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"-DDEBUG=1",
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||||
],
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||||
),
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||||
],
|
||||
),
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||||
flag_set(
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||||
actions = COMPILE_ACTIONS + LINK_ACTIONS,
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||||
flag_groups = [
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||||
flag_group(
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||||
flags = [
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||||
"-g3",
|
||||
],
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||||
),
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
feature(
|
||||
name = "fastbuild_flags",
|
||||
enabled = True,
|
||||
requires = [feature_set(["fastbuild"])],
|
||||
flag_sets = [
|
||||
flag_set(
|
||||
actions = COMPILE_ACTIONS,
|
||||
flag_groups = [
|
||||
flag_group(
|
||||
flags = [
|
||||
"-O1",
|
||||
"-DDEBUG=1",
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
flag_set(
|
||||
actions = COMPILE_ACTIONS + LINK_ACTIONS,
|
||||
flag_groups = [
|
||||
flag_group(
|
||||
flags = [
|
||||
"-g1",
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
feature(
|
||||
name = "opt_flags",
|
||||
enabled = True,
|
||||
requires = [feature_set(["opt"])],
|
||||
flag_sets = [
|
||||
flag_set(
|
||||
actions = COMPILE_ACTIONS,
|
||||
flag_groups = [
|
||||
flag_group(
|
||||
flags = [
|
||||
"-O3",
|
||||
"-DNDEBUG=1",
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
feature(
|
||||
name = "c++20",
|
||||
provides = ["c++_version"],
|
||||
flag_sets = [
|
||||
flag_set(
|
||||
actions = COMPILE_ACTIONS,
|
||||
flag_groups = [
|
||||
flag_group(
|
||||
flags = ["-std=c++20"],
|
||||
),
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
feature(
|
||||
name = "c++23",
|
||||
provides = ["c++_version"],
|
||||
flag_sets = [
|
||||
flag_set(
|
||||
actions = COMPILE_ACTIONS,
|
||||
flag_groups = [
|
||||
flag_group(
|
||||
flags = ["-std=c++23"],
|
||||
),
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
feature(
|
||||
name = "asan",
|
||||
implies = ["sanitize"],
|
||||
flag_sets = [
|
||||
flag_set(
|
||||
actions = COMPILE_ACTIONS + LINK_ACTIONS,
|
||||
flag_groups = [
|
||||
flag_group(
|
||||
flags = [
|
||||
"-fsanitize=address",
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
] + asan_link_flag_sets,
|
||||
),
|
||||
feature(
|
||||
name = "ubsan",
|
||||
implies = ["sanitize"],
|
||||
flag_sets = [
|
||||
flag_set(
|
||||
actions = COMPILE_ACTIONS + LINK_ACTIONS,
|
||||
flag_groups = [
|
||||
flag_group(
|
||||
flags = [
|
||||
"-fsanitize=undefined",
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
] + ubsan_link_flag_sets,
|
||||
),
|
||||
feature(
|
||||
name = "sanitize",
|
||||
flag_sets = [
|
||||
flag_set(
|
||||
actions = COMPILE_ACTIONS,
|
||||
flag_groups = [
|
||||
flag_group(
|
||||
flags = [
|
||||
"-fno-omit-frame-pointer",
|
||||
"-fno-sanitize-ignorelist",
|
||||
"-fno-sanitize-recover=all",
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
feature(
|
||||
name = "final_flags",
|
||||
enabled = True,
|
||||
flag_sets = [
|
||||
flag_set(
|
||||
actions = COMPILE_ACTIONS,
|
||||
flag_groups = [
|
||||
flag_group(
|
||||
flags = ["%{user_compile_flags}"],
|
||||
expand_if_available = "user_compile_flags",
|
||||
iterate_over = "user_compile_flags",
|
||||
),
|
||||
flag_group(
|
||||
flags = ["-o", "%{output_file}"],
|
||||
expand_if_available = "output_file",
|
||||
),
|
||||
flag_group(
|
||||
flags = ["%{source_file}"],
|
||||
expand_if_available = "source_file",
|
||||
),
|
||||
],
|
||||
),
|
||||
flag_set(
|
||||
actions = LINK_ACTIONS,
|
||||
flag_groups = [
|
||||
flag_group(
|
||||
flags = ["%{user_link_flags}"],
|
||||
expand_if_available = "user_link_flags",
|
||||
iterate_over = "user_link_flags",
|
||||
),
|
||||
flag_group(
|
||||
flags = ["-o", "%{output_execpath}"],
|
||||
expand_if_available = "output_execpath",
|
||||
),
|
||||
],
|
||||
),
|
||||
flag_set(
|
||||
actions = LINK_ACTIONS + ARCHIVE_ACTIONS,
|
||||
flag_groups = [
|
||||
flag_group(
|
||||
flags = ["@%{linker_param_file}"],
|
||||
expand_if_available = "linker_param_file",
|
||||
),
|
||||
],
|
||||
),
|
||||
],
|
||||
),
|
||||
]
|
||||
|
||||
return cc_common.create_cc_toolchain_config_info(
|
||||
ctx = ctx,
|
||||
toolchain_identifier = "%s-toolchain" % os,
|
||||
compiler = "clang",
|
||||
artifact_name_patterns = artifact_name_patterns,
|
||||
cxx_builtin_include_directories = CLANG_INCLUDE_DIRS,
|
||||
tool_paths = tool_paths,
|
||||
action_configs = action_configs,
|
||||
features = features,
|
||||
)
|
||||
|
||||
toolchain_config = rule(
|
||||
implementation = _impl,
|
||||
attrs = {
|
||||
"os": attr.string(mandatory = True),
|
||||
},
|
||||
provides = [CcToolchainConfigInfo],
|
||||
)
|
||||
|
||||
def _declare_toolchain_impl(name, os, arch, visibility):
|
||||
toolchain_config(
|
||||
name = name + "_config",
|
||||
os = os,
|
||||
)
|
||||
|
||||
native.cc_toolchain(
|
||||
name = name + "_cc",
|
||||
toolchain_config = name + "_config",
|
||||
all_files = ":empty",
|
||||
compiler_files = ":empty",
|
||||
linker_files = ":empty",
|
||||
objcopy_files = ":empty",
|
||||
strip_files = ":empty",
|
||||
dwp_files = ":empty",
|
||||
)
|
||||
|
||||
native.toolchain(
|
||||
name = name + "_def",
|
||||
toolchain = name + "_cc",
|
||||
toolchain_type = "@rules_cc//cc:toolchain_type",
|
||||
exec_compatible_with = [
|
||||
"@platforms//cpu:%s" % arch,
|
||||
"@platforms//os:%s" % os,
|
||||
],
|
||||
target_compatible_with = [
|
||||
"@platforms//cpu:%s" % arch,
|
||||
"@platforms//os:%s" % os,
|
||||
],
|
||||
visibility = ["//visibility:public"],
|
||||
)
|
||||
|
||||
declare_toolchain = macro(
|
||||
implementation = _declare_toolchain_impl,
|
||||
attrs = {
|
||||
"os": attr.string(mandatory = True, configurable = False),
|
||||
"arch": attr.string(mandatory = True, configurable = False),
|
||||
}
|
||||
)
|
||||
Reference in New Issue
Block a user