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@@ -4,20 +4,23 @@
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"""Provides variables and rules to work with Clang's runtime library sources.
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-These are organized into groups based on the runtime functionality:
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+These are organized into groups based on the Clang runtimes providing them and
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+how they are built:
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- CRT: The C language runtimes not provided by the C standard library, currently
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just infrastructure for global initialization and teardown.
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- Builtins: The compiler builtins library mirroring `libgcc` that provides
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function definitions for operations not reliably available in hardware but
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needed by Clang.
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+- Libc++ and libc++abi: The C++ standard library and its ABI components.
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+- Libunwind: The unwinding library.
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Future runtimes we plan to add support for but not yet included:
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-- Libunwind
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-- Libc++ and libc++abi
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- Sanitizers
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- Profiling runtimes
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"""
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+load("@llvm-project//libcxx:libcxx_library.bzl", "libcxx_and_abi_copts")
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+load("@llvm-project//libunwind:libunwind_library.bzl", "libunwind_copts")
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load("//bazel/cc_rules:defs.bzl", "cc_library")
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CRT_FILES = {
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@@ -38,78 +41,29 @@ BUILTINS_FILEGROUPS = {
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}
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RUNTIMES_FILEGROUPS = {
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- "libcxx": "@llvm-project//libcxx:libcxx_srcs",
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+ "libcxx_linux": "@llvm-project//libcxx:libcxx_linux_srcs",
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+ "libcxx_macos": "@llvm-project//libcxx:libcxx_macos_srcs",
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+ "libcxx_win32": "@llvm-project//libcxx:libcxx_win32_srcs",
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"libcxxabi": "@llvm-project//libcxxabi:libcxxabi_srcs",
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"libunwind": "@llvm-project//libunwind:libunwind_srcs",
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}
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-_TEMPLATE = """
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-// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
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-// Exceptions. See /LICENSE for license information.
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-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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-//
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-// Generated header file of strings describing the Clang runtime library source
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-// files.
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-//
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-// See toolchain/driver/runtime_sources.bzl for more details.
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-
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-#ifndef CARBON_TOOLCHAIN_BASE_RUNTIME_SOURCES_H_
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-#define CARBON_TOOLCHAIN_BASE_RUNTIME_SOURCES_H_
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-
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-#include "llvm/ADT/StringRef.h"
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-
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-namespace Carbon::RuntimeSources {{
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-
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-inline constexpr llvm::StringLiteral CrtBegin = {crtbegin_src};
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-inline constexpr llvm::StringLiteral CrtEnd = {crtend_src};
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-
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-inline constexpr llvm::StringLiteral BuiltinsGenericSrcs[] = {{
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-{generic_srcs}
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-}};
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-inline constexpr llvm::StringLiteral BuiltinsMacosSrcs[] = {{
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-{macos_srcs}
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-}};
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-inline constexpr llvm::StringLiteral BuiltinsBf16Srcs[] = {{
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-{bf16_srcs}
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-}};
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-inline constexpr llvm::StringLiteral BuiltinsTfSrcs[] = {{
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-{tf_srcs}
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-}};
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-inline constexpr llvm::StringLiteral BuiltinsX86ArchSrcs[] = {{
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-{x86_arch_srcs}
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-}};
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-inline constexpr llvm::StringLiteral BuiltinsX86Fp80Srcs[] = {{
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-{x86_fp80_srcs}
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-}};
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-inline constexpr llvm::StringLiteral BuiltinsAarch64Srcs[] = {{
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-{aarch64_srcs}
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-}};
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-inline constexpr llvm::StringLiteral BuiltinsX86_64Srcs[] = {{
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-{x86_64_srcs}
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-}};
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-inline constexpr llvm::StringLiteral BuiltinsI386Srcs[] = {{
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-{i386_srcs}
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-}};
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-
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-constexpr inline llvm::StringLiteral LibcxxSrcs[] = {{
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-{libcxx}
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-}};
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-
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-constexpr inline llvm::StringLiteral LibcxxabiSrcs[] = {{
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-{libcxxabi}
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-}};
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-
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-constexpr inline llvm::StringLiteral LibunwindSrcs[] = {{
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-{libunwind}
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-}};
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-
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-}} // namespace Carbon::RuntimeSources
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-
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-#endif // CARBON_TOOLCHAIN_BASE_RUNTIME_SOURCES_H_
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-"""
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+RUNTIMES_PREFIXES = {
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+ "libcxx_linux": "libcxx/",
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+ "libcxx_macos": "libcxx/",
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+ "libcxx_win32": "libcxx/",
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+ "libcxxabi": "libcxxabi/",
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+ "libunwind": "libunwind/",
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+}
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+
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+def _format_one_per_line(list):
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+ return "\n" + "\n".join([
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+ ' "{0}",'.format(item)
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+ for item in list
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+ ]) + "\n"
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def _builtins_path(file):
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- """Returns the runtime install path for a file in CompilerRT's builtins library."""
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+ """Returns the install path for a file in CompilerRT's builtins library."""
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# The CompilerRT package has the builtins runtime sources in the
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# "lib/builtins/" subdirectory, and we install into a "builtins/"
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@@ -118,13 +72,13 @@ def _builtins_path(file):
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return file.owner.name.removeprefix("lib/")
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def _runtimes_path(file):
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- """Returns the runtime install path for a file in a normal runtimes library."""
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+ """Returns the install path for a file in a normal runtimes library."""
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return file.owner.name
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def _get_path(file_attr, to_path_fn):
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files = file_attr[DefaultInfo].files.to_list()
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if len(files) > 1:
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- fail(msg = "Expected a single file and got {0} files.".format(len(files)))
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+ fail("Expected a single file and got {0} files.".format(len(files)))
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return '"{0}"'.format(to_path_fn(files[0]))
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@@ -134,29 +88,44 @@ def _get_paths(files_attr, to_path_fn, prefix = ""):
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files.extend(src[DefaultInfo].files.to_list())
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files.extend(src[DefaultInfo].default_runfiles.files.to_list())
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- return "\n".join([
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- ' "{0}{1}",'.format(prefix, to_path_fn(f))
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+ return _format_one_per_line([
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+ "{0}{1}".format(prefix, to_path_fn(f))
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for f in files
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])
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-def _generate_runtime_sources_h_rule(ctx):
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- h_file = ctx.actions.declare_file(ctx.label.name)
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- ctx.actions.write(h_file, _TEMPLATE.format(**({
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- k: _get_path(getattr(ctx.attr, "_" + k), _builtins_path)
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+def _get_substitutions(ctx):
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+ key_attr = lambda k: getattr(ctx.attr, "_" + k)
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+ return {
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+ "LIBCXX_AND_ABI_COPTS": _format_one_per_line(libcxx_and_abi_copts),
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+ "LIBUNWIND_COPTS": _format_one_per_line(libunwind_copts),
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+ } | {
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+ k.upper(): _get_path(key_attr(k), _builtins_path)
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for k in CRT_FILES.keys()
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} | {
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- k: _get_paths(getattr(ctx.attr, "_" + k), _builtins_path)
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+ "BUILTINS_" + k.upper(): _get_paths(key_attr(k), _builtins_path)
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for k in BUILTINS_FILEGROUPS.keys()
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} | {
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- # Other runtimes are installed under separate directories named the same
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- # as their key.
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- k: _get_paths(getattr(ctx.attr, "_" + k), _runtimes_path, k + "/")
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+ # Other runtimes are installed under separate directories named the
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+ # same as their key.
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+ k.upper() + "_SRCS": _get_paths(
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+ key_attr(k),
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+ _runtimes_path,
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+ RUNTIMES_PREFIXES[k],
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+ )
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for k in RUNTIMES_FILEGROUPS.keys()
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- })))
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+ }
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+
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+def _generate_runtimes_build_info_h_rule(ctx):
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+ h_file = ctx.actions.declare_file(ctx.label.name)
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+ ctx.actions.expand_template(
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+ template = ctx.file._template_file,
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+ output = h_file,
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+ substitutions = _get_substitutions(ctx),
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+ )
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return [DefaultInfo(files = depset([h_file]))]
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-generate_runtime_sources_h = rule(
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- implementation = _generate_runtime_sources_h_rule,
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+generate_runtimes_build_info_h = rule(
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+ implementation = _generate_runtimes_build_info_h_rule,
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attrs = {
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"_" + k: attr.label(default = v, allow_single_file = True)
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for k, v in CRT_FILES.items()
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@@ -164,23 +133,27 @@ generate_runtime_sources_h = rule(
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"_" + k: attr.label_list(default = [v], allow_files = True)
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for k, v in BUILTINS_FILEGROUPS.items() + RUNTIMES_FILEGROUPS.items()
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} | {
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+ "_template_file": attr.label(
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+ default = "runtimes_build_info.tpl.h",
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+ allow_single_file = True,
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+ ),
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},
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)
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-def generate_runtime_sources_cc_library(name, deps = [], **kwargs):
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- """Generates a `runtime_sources.h` header and a `cc_library` rule for it.
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+def generate_runtimes_build_info_cc_library(name, deps = [], **kwargs):
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+ """Generates a `runtimes_build_info.h` header and a `cc_library` rule.
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- This first generates the header file with variables describing the runtime
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- sources from Clang, and then a `cc_library` that exports that header.
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+ This first generates the header file with variables describing the runtimes
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+ build info from Clang, and then a `cc_library` that exports that header.
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The `cc_library` rule name is the provided `name` and should be depended on
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by code that includes the generated header. The `kwargs` are expanded into
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the `cc_library` in case other attributes need to be configured there.
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"""
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- generate_runtime_sources_h(name = "runtime_sources.h")
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+ generate_runtimes_build_info_h(name = "runtimes_build_info.h")
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cc_library(
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name = name,
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- hdrs = ["runtime_sources.h"],
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+ hdrs = ["runtimes_build_info.h"],
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deps = [
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# For StringRef.h
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"@llvm-project//llvm:Support",
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Chandler Carruth