motiejus
/
hermetic_cc_toolchain
1
Fork 0
Code Releases Activity
hermetic_cc_toolchain/zig-toolchains/defs.bzl

257 lines
9.0 KiB
Python
Raw Blame History

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
load(":zig_toolchain.bzl", "zig_cc_toolchain_config")
DEFAULT_TOOL_PATHS = {
"ar": "llvm-ar", # TODO this should be "build-lib", see https://github.com/ziglang/zig/issues/7915
"gcc": "c++", # https://github.com/bazelbuild/bazel/issues/4644
# TODO See https://github.com/ziglang/zig/issues/7917 for zig issue to implement these other tools.
"cpp": "/usr/bin/false",
"gcov": "/usr/bin/false",
"nm": "/usr/bin/false",
"objdump": "/usr/bin/false",
"strip": "/usr/bin/false",
}.items()
DEFAULT_INCLUDE_DIRECTORIES = [
"include",
# "libcxx/include",
# "libcxxabi/include",
# "libunwind/include",
]
# https://github.com/ziglang/zig/blob/0cfa39304b18c6a04689bd789f5dc4d035ec43b0/src/main.zig#L2962-L2966
TARGET_CONFIGS = [
struct(
target="x86_64-macos-gnu",
includes=[
"libcxx/include",
"libcxxabi/include",
"libunwind/include",
"libc/include/any-macos-any",
"libc/include/x86_64-macos-any",
"libc/include/x86_64-macos-gnu",
],
# linkopts=["-lc++", "-lc++abi"],
linkopts=[],
copts=[],
bazel_target_cpu="darwin",
constraint_values=["@platforms//os:macos", "@platforms//cpu:x86_64"],
tool_paths={"ld": "ld64.lld"},
),
# If this gets uncommented, bazel will put `-target <...>gnu`, even if
# the platform is explicitly set to:
# --platforms=@com_github_ziglang_zig//:x86_64-linux-musl
#struct(
# target="x86_64-linux-gnu.2.28",
# includes=[
# "libcxx/include",
# "libcxxabi/include",
# "libunwind/include",
# "libc/include/generic-glibc",
# "libc/include/any-linux-any",
# "libc/include/x86_64-linux-gnu",
# "libc/include/x86_64-linux-any",
# ],
# linkopts=["-lc++", "-lc++abi"],
# copts=[],
# bazel_target_cpu="k8",
# constraint_values=["@platforms//os:linux", "@platforms//cpu:x86_64"],
# tool_paths={"ld": "ld.lld"},
#),
struct(
target="x86_64-linux-musl",
includes=[
"libcxx/include",
"libcxxabi/include",
"libc/include/generic-musl",
"libc/include/any-linux-any",
"libc/include/x86_64-linux-musl",
"libc/include/x86_64-linux-any",
],
linkopts=[],
copts=["-D_LIBCPP_HAS_MUSL_LIBC", "-D_LIBCPP_HAS_THREAD_API_PTHREAD"],
bazel_target_cpu="k8",
constraint_values=["@platforms//os:linux", "@platforms//cpu:x86_64"],
tool_paths={"ld": "ld.lld"},
),
]
def toolchain_repositories():
zig_repository(
name = "com_github_ziglang_zig",
version = "0.8.0-dev.2729+87dae0ce9",
url_format = "https://ziglang.org/builds/zig-{host_platform}-{version}.tar.xz",
host_platform_sha256 = {
"linux-x86_64": "8f15f6cc88dd3afb0a6c0790aef8ee83fa7f7e3a8499154bc23c5b6d68ab74ed",
"macos-x86_64": "2d410a4d5ababb61a1deccca724357fda4ed0277b722fc45ea10adf2ed215c5e",
},
host_platform_include_root = {
"macos-x86_64": "lib/zig/",
"linux-x86_64": "lib/",
}
)
def register_all_toolchains():
for target_config in TARGET_CONFIGS:
native.register_toolchains(
"@com_github_ziglang_zig//:%s_toolchain" % target_config.target,
)
ZIG_TOOL_PATH = "tools/{zig_tool}"
ZIG_TOOL_WRAPPER = """#!/bin/bash
export HOME=$TMPDIR
exec "{zig}" "{zig_tool}" "$@"
"""
ZIG_TOOLS = [
"c++",
"cc",
"ar",
# List of ld tools: https://github.com/ziglang/zig/blob/0cfa39304b18c6a04689bd789f5dc4d035ec43b0/src/main.zig#L2962-L2966
# and also: https://github.com/ziglang/zig/issues/3257
"ld.lld", # ELF
"ld64.lld", # Mach-O
"lld-link", # COFF
"wasm-ld", # WebAssembly
]
BUILD = """
load("@zig-cc-bazel//zig-toolchains:defs.bzl", "zig_build_macro")
package(default_visibility = ["//visibility:public"])
zig_build_macro(absolute_path={absolute_path}, zig_include_root={zig_include_root})
"""
def _zig_repository_impl(repository_ctx):
if repository_ctx.os.name.lower().startswith("mac os"):
host_platform = "macos-x86_64"
else:
host_platform = "linux-x86_64"
zig_include_root = repository_ctx.attr.host_platform_include_root[host_platform]
zig_sha256 = repository_ctx.attr.host_platform_sha256[host_platform]
format_vars = {
"version" : repository_ctx.attr.version,
"host_platform" : host_platform,
}
zig_url = repository_ctx.attr.url_format.format(**format_vars)
repository_ctx.download_and_extract(
url = zig_url,
stripPrefix = "zig-{host_platform}-{version}/".format(**format_vars),
sha256 = zig_sha256,
)
for zig_tool in ZIG_TOOLS:
repository_ctx.file(
ZIG_TOOL_PATH.format(zig_tool=zig_tool),
ZIG_TOOL_WRAPPER.format(zig=str(repository_ctx.path("zig")), zig_tool=zig_tool),
)
absolute_path = json.encode(str(repository_ctx.path("")))
repository_ctx.file(
"BUILD",
BUILD.format(absolute_path=absolute_path, zig_include_root=json.encode(zig_include_root)),
)
zig_repository = repository_rule(
attrs = {
"url": attr.string(),
"version": attr.string(),
"host_platform_sha256": attr.string_dict(),
"url_format": attr.string(),
"host_platform_include_root": attr.string_dict(),
},
implementation = _zig_repository_impl,
)
def filegroup(name, **kwargs):
native.filegroup(name = name, **kwargs)
return ":" + name
def zig_build_macro(absolute_path, zig_include_root):
filegroup(name="empty")
filegroup(name="zig_compiler", srcs=["zig"])
filegroup(name="lib/std", srcs=native.glob(["lib/std/**"]))
lazy_filegroups = {}
for target_config in TARGET_CONFIGS:
target = target_config.target
native.platform(name = target, constraint_values = target_config.constraint_values)
all_srcs = []
ar_srcs = [":zig_compiler"]
linker_srcs = [":zig_compiler"]
compiler_srcs = [":zig_compiler"]
tool_srcs = {"gcc": compiler_srcs, "ld": linker_srcs, "ar": ar_srcs}
cxx_builtin_include_directories = []
for d in DEFAULT_INCLUDE_DIRECTORIES + target_config.includes:
d = zig_include_root + d
if d not in lazy_filegroups:
lazy_filegroups[d] = filegroup(name=d, srcs=native.glob([d + "/**"]))
compiler_srcs.append(lazy_filegroups[d])
cxx_builtin_include_directories.append(absolute_path + "/" + d)
absolute_tool_paths = {}
for name, path in target_config.tool_paths.items() + DEFAULT_TOOL_PATHS:
if path[0] == "/":
absolute_tool_paths[name] = path
continue
tool_path = ZIG_TOOL_PATH.format(zig_tool=path)
absolute_tool_paths[name] = "%s/%s" % (absolute_path, tool_path)
tool_srcs[name].append(tool_path)
ar_files = filegroup(name=target + "_ar_files", srcs=ar_srcs)
linker_files = filegroup(name=target + "_linker_files", srcs=linker_srcs)
compiler_files = filegroup(name=target + "_compiler_files", srcs=compiler_srcs)
all_files = filegroup(name=target + "_all_files", srcs=all_srcs + [ar_files, linker_files, compiler_files])
zig_cc_toolchain_config(
name = target + "_cc_toolchain_config",
target = target,
tool_paths = absolute_tool_paths,
cxx_builtin_include_directories = cxx_builtin_include_directories,
copts = target_config.copts,
linkopts = target_config.linkopts,
target_system_name = "unknown",
target_cpu = target_config.bazel_target_cpu,
target_libc = "unknown",
compiler = "clang",
abi_version = "unknown",
abi_libc_version = "unknown",
)
native.cc_toolchain(
name = target + "_cc_toolchain",
toolchain_identifier = target + "-toolchain",
toolchain_config = ":%s_cc_toolchain_config" % target,
all_files = all_files,
ar_files = ar_files,
compiler_files = compiler_files,
linker_files = linker_files,
dwp_files = ":empty",
objcopy_files = ":empty",
strip_files = ":empty",
supports_param_files = 0,
)
native.cc_toolchain_suite(
name = target + "_cc_toolchain_suite",
toolchains = {
target_config.bazel_target_cpu: ":%s_cc_toolchain" % target,
},
tags = ["manual"]
)
native.toolchain(
name = target + "_toolchain",
exec_compatible_with = None,
target_compatible_with = target_config.constraint_values,
toolchain = ":%s_cc_toolchain" % target,
toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
)
View Git Blame Copy Permalink