# -*- bazel-starlark -*-
# Copyright 2023 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Siso configuration for clang."""
load("@builtin//path.star", "path")
load("@builtin//struct.star", "module")
load("./ar.star", "ar")
load("./config.star", "config")
load("./gn_logs.star", "gn_logs")
load("./mac_sdk.star", "mac_sdk")
load("./win_sdk.star", "win_sdk")
__clang_plugin_configs = [
"build/config/unsafe_buffers_paths.txt",
"build/config/warning_suppression.txt",
# crbug.com/418842344: Angle, PDFium use a different plugin config.
"unsafe_buffers_paths.txt",
]
def __filegroups(ctx):
gn_logs_data = gn_logs.read(ctx)
# source_root is absolute path of chromium source top directory ("//"),
# set only for CrOS's chroot builds that use rbe_exec_root="/".
root = gn_logs_data.get("source_root", "")
fg = {
path.join(root, "third_party/libc++/src/include") + ":headers": {
"type": "glob",
"includes": ["*"],
# can't use "*.h", because c++ headers have no extension.
},
path.join(root, "third_party/libc++abi/src/include") + ":headers": {
"type": "glob",
"includes": ["*.h"],
},
# vendor provided headers for libc++.
path.join(root, "buildtools/third_party/libc++") + ":headers": {
"type": "glob",
"includes": [
"__*",
],
},
# toolchain root
# :headers for compiling
path.join(root, "third_party/llvm-build/Release+Asserts") + ":headers": {
"type": "glob",
"includes": [
"*.h",
"*.modulemap",
"bin/clang",
"bin/clang++",
"bin/clang-*", # clang-cl, clang-<ver>
"*_ignorelist.txt",
# https://crbug.com/335997052
"clang_rt.profile*.lib",
],
},
}
if win_sdk.enabled(ctx):
fg.update(win_sdk.filegroups(ctx))
if mac_sdk.enabled(ctx):
fg.update(mac_sdk.filegroups(ctx))
return fg
def __input_deps(ctx):
build_dir = ctx.fs.canonpath(".")
return {
# need this because we use
# third_party/libc++/src/include:headers,
# but scandeps doesn't scan `__config` file, which uses
# `#include <__config_site>`
# also need `__assertion_handler`. b/321171148
"third_party/libc++/src/include": [
"buildtools/third_party/libc++:headers",
],
# This is necessary for modules build where libc++ headers are copied to build directory.
path.join(build_dir, "gen/third_party/libc++/src/include") + ":headers": [
path.join(build_dir, "gen/third_party/libc++/src/include/module.modulemap"),
path.join(build_dir, "phony/buildtools/third_party/libc++/copy_custom_headers") + ":inputs",
path.join(build_dir, "phony/buildtools/third_party/libc++/copy_libcxx_headers") + ":inputs",
],
"third_party/llvm-build/Release+Asserts/bin/clang": __clang_plugin_configs,
"third_party/llvm-build/Release+Asserts/bin/clang++": __clang_plugin_configs,
"third_party/llvm-build/Release+Asserts/bin/clang-cl": __clang_plugin_configs,
"third_party/llvm-build/Release+Asserts/bin/clang-cl.exe": __clang_plugin_configs,
"third_party/llvm-build/Release+Asserts/bin/lld-link": [
"build/config/c++/libc++.natvis",
"build/win/as_invoker.manifest",
"build/win/common_controls.manifest",
"build/win/compatibility.manifest",
"build/win/require_administrator.manifest",
"build/win/segment_heap.manifest",
"remoting/host/win/dpi_aware.manifest",
"third_party/llvm-build/Release+Asserts/bin/lld",
"tools/win/DebugVisualizers/absl.natvis",
"tools/win/DebugVisualizers/blink.natvis",
"tools/win/DebugVisualizers/chrome.natvis",
],
"third_party/llvm-build/Release+Asserts/bin/lld-link.exe": [
"build/config/c++/libc++.natvis",
"build/win/as_invoker.manifest",
"build/win/common_controls.manifest",
"build/win/compatibility.manifest",
"build/win/require_administrator.manifest",
"build/win/segment_heap.manifest",
"remoting/host/win/dpi_aware.manifest",
"third_party/llvm-build/Release+Asserts/bin/lld.exe",
"tools/win/DebugVisualizers/absl.natvis",
"tools/win/DebugVisualizers/blink.natvis",
"tools/win/DebugVisualizers/chrome.natvis",
],
"build/toolchain/gcc_solink_wrapper.py": [
"build/toolchain/whole_archive.py",
"build/toolchain/wrapper_utils.py",
],
"build/toolchain/gcc_solink_wrapper.py:link": [
"build/toolchain/gcc_solink_wrapper.py",
"build/toolchain/whole_archive.py",
"build/toolchain/wrapper_utils.py",
],
"build/toolchain/gcc_link_wrapper.py": [
"build/toolchain/whole_archive.py",
"build/toolchain/wrapper_utils.py",
],
"build/toolchain/gcc_link_wrapper.py:link": [
"build/toolchain/gcc_link_wrapper.py",
"build/toolchain/whole_archive.py",
"build/toolchain/wrapper_utils.py",
],
"build/toolchain/apple/linker_driver.py:link": [
"build/toolchain/apple/linker_driver.py",
"build/toolchain/whole_archive.py",
],
"build/toolchain/apple/solink_driver.py:link": [
"build/toolchain/apple/linker_driver.py",
"build/toolchain/apple/solink_driver.py",
"build/toolchain/whole_archive.py",
],
}
def __lld_link(ctx, cmd):
# Replace thin archives with /start-lib ... /end-lib in rsp file.
new_lines = []
for line in str(cmd.rspfile_content).split("\n"):
new_elems = []
for elem in line.split(" "):
# Parse only .lib files.
if not elem.endswith(".lib"):
new_elems.append(elem)
continue
# Parse files under the out dir.
fname = ctx.fs.canonpath(elem)
if not ctx.fs.exists(fname):
new_elems.append(elem)
continue
# Check if the library is generated or not.
# The source libs are not under the build dir.
build_dir = ctx.fs.canonpath("./")
if path.rel(build_dir, fname).startswith("../../"):
new_elems.append(elem)
continue
ents = ar.entries(ctx, fname, build_dir)
if not ents:
new_elems.append(elem)
continue
new_elems.append("-start-lib")
new_elems.extend(ents)
new_elems.append("-end-lib")
new_lines.append(" ".join(new_elems))
ctx.actions.fix(rspfile_content = "\n".join(new_lines))
def __thin_archive(ctx, cmd):
# TODO: This handler can be used despite remote linking?
if not config.get(ctx, "remote-link"):
return
if "lld-link" in cmd.args[0]:
if not "/llvmlibthin" in cmd.args:
print("not thin archive")
return
else:
# check command line to see "-T" and "-S".
# rm -f obj/third_party/angle/libangle_common.a && "../../third_party/llvm-build/Release+Asserts/bin/llvm-ar" -T -S -r -c -D obj/third_party/angle/libangle_common.a @"obj/third_party/angle/libangle_common.a.rsp"
if not ("-T" in cmd.args[-1] and "-S" in cmd.args[-1]):
print("not thin archive without symbol table")
return
# create thin archive without symbol table by handler.
rspfile_content = str(cmd.rspfile_content)
inputs = []
for line in rspfile_content.split("\n"):
for fname in line.split(" "):
inputs.append(ctx.fs.canonpath(fname))
data = ar.create(ctx, path.dir(cmd.outputs[0]), inputs)
ctx.actions.write(cmd.outputs[0], data)
ctx.actions.exit(exit_status = 0)
__handlers = {
"lld_link": __lld_link,
"lld_thin_archive": __thin_archive,
}
clang_all = module(
"clang_all",
filegroups = __filegroups,
input_deps = __input_deps,
handlers = __handlers,
)
