378 lines
12 KiB
Python
378 lines
12 KiB
Python
load("@bazel_skylib//lib:shell.bzl", "shell")
|
|
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
|
|
load(":zig_toolchain.bzl", "zig_cc_toolchain_config")
|
|
|
|
DEFAULT_TOOL_PATHS = {
|
|
"ar": "ar",
|
|
"gcc": "c++", # https://github.com/bazelbuild/bazel/issues/4644
|
|
"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",
|
|
]
|
|
|
|
# -Os, -O2 or -O3 must be set, because some dependencies use C's undefined
|
|
# behavior. See https://github.com/ziglang/zig/issues/4830
|
|
DEFAULT_COPTS = ["-O3"]
|
|
|
|
_fcntl_map = """
|
|
GLIBC_2.2.5 {
|
|
fcntl;
|
|
};
|
|
"""
|
|
_fcntl_h = """
|
|
#ifdef __ASSEMBLER__
|
|
.symver fcntl64, fcntl@GLIBC_2.2.5
|
|
#else
|
|
__asm__(".symver fcntl64, fcntl@GLIBC_2.2.5");
|
|
#endif
|
|
"""
|
|
|
|
# Zig supports even older glibcs than defined below, but we have tested only
|
|
# down to 2.17.
|
|
# $ zig targets | jq -r '.glibc[]' | sort -V
|
|
_GLIBCS = [
|
|
"2.17",
|
|
"2.18",
|
|
"2.19",
|
|
"2.22",
|
|
"2.23",
|
|
"2.24",
|
|
"2.25",
|
|
"2.26",
|
|
"2.27",
|
|
"2.28",
|
|
"2.29",
|
|
"2.30",
|
|
"2.31",
|
|
"2.32",
|
|
"2.33",
|
|
]
|
|
|
|
DEFAULT_TOOLCHAINS = [
|
|
"linux_arm64_gnu.2.19", # Debian Jessie arm64
|
|
#"linux_amd64_gnu.2.19", # there is a problem with fcntl on arm64, this is WIP
|
|
"linux_amd64_gnu.2.28", # there is a problem with fcntl on arm64, this is WIP
|
|
"darwin_amd64",
|
|
"darwin_arm64",
|
|
]
|
|
|
|
def _target_darwin(gocpu, zigcpu):
|
|
return struct(
|
|
gotarget = "darwin_{}".format(gocpu),
|
|
zigtarget = "{}-macos-gnu".format(zigcpu),
|
|
includes = [
|
|
"libunwind/include",
|
|
"libc/include/any-macos-any",
|
|
"libc/include/{}-macos-any".format(zigcpu),
|
|
"libc/include/{}-macos-gnu".format(zigcpu),
|
|
],
|
|
linkopts = [],
|
|
copts = DEFAULT_COPTS,
|
|
bazel_target_cpu = "darwin",
|
|
constraint_values = [
|
|
"@platforms//os:macos",
|
|
"@platforms//cpu:{}".format(zigcpu),
|
|
],
|
|
tool_paths = {"ld": "ld64.lld"},
|
|
)
|
|
|
|
def _target_linux_gnu(gocpu, zigcpu, glibc_version = ""):
|
|
glibc_suffix = "gnu"
|
|
if glibc_version != "":
|
|
glibc_suffix = "gnu.{}".format(glibc_version)
|
|
|
|
# https://github.com/ziglang/zig/issues/5882#issuecomment-888250676
|
|
# fcntl_hack is only required for glibc 2.27 or less. We assume that
|
|
# glibc_version == "" (autodetect) is running a recent glibc version, thus
|
|
# adding this hack only when glibc is explicitly 2.27 or lower.
|
|
fcntl_hack = False
|
|
if glibc_version == "":
|
|
# zig doesn't reliably detect the glibc version, so
|
|
# often falls back to 2.17; the hack should be included.
|
|
# https://github.com/ziglang/zig/issues/6469
|
|
fcntl_hack = True
|
|
else:
|
|
# hack is required for 2.27 or less.
|
|
fcntl_hack = glibc_version < "2.28"
|
|
|
|
return struct(
|
|
gotarget = "linux_{}_{}".format(gocpu, glibc_suffix),
|
|
zigtarget = "{}-linux-{}".format(zigcpu, glibc_suffix),
|
|
includes = [
|
|
"libunwind/include",
|
|
"libc/include/generic-glibc",
|
|
"libc/include/any-linux-any",
|
|
"libc/include/{}-linux-gnu".format(zigcpu),
|
|
"libc/include/{}-linux-any".format(zigcpu),
|
|
],
|
|
toplevel_include = ["glibc-hacks"] if fcntl_hack else [],
|
|
compiler_extra_includes = ["glibc-hacks/glibchack-fcntl.h"] if fcntl_hack else [],
|
|
linker_version_scripts = ["glibc-hacks/fcntl.map"] if fcntl_hack else [],
|
|
linkopts = ["-lc++", "-lc++abi"],
|
|
copts = DEFAULT_COPTS,
|
|
bazel_target_cpu = "k8",
|
|
constraint_values = [
|
|
"@platforms//os:linux",
|
|
"@platforms//cpu:{}".format(zigcpu),
|
|
],
|
|
tool_paths = {"ld": "ld.lld"},
|
|
)
|
|
|
|
def _target_linux_musl(gocpu, zigcpu):
|
|
return struct(
|
|
gotarget = "linux_{}_musl".format(gocpu),
|
|
zigtarget = "{}-linux-musl".format(zigcpu),
|
|
includes = [
|
|
"libc/include/generic-musl",
|
|
"libc/include/any-linux-any",
|
|
"libc/include/{}-linux-musl".format(zigcpu),
|
|
"libc/include/{}-linux-any".format(zigcpu),
|
|
],
|
|
linkopts = ["-s", "-w"],
|
|
copts = DEFAULT_COPTS + ["-D_LIBCPP_HAS_MUSL_LIBC", "-D_LIBCPP_HAS_THREAD_API_PTHREAD"],
|
|
bazel_target_cpu = "k8",
|
|
constraint_values = [
|
|
"@platforms//os:linux",
|
|
"@platforms//cpu:{}".format(zigcpu),
|
|
],
|
|
tool_paths = {"ld": "ld.lld"},
|
|
)
|
|
|
|
def register_toolchains(
|
|
register = DEFAULT_TOOLCHAINS,
|
|
speed_first_safety_later = "auto"):
|
|
zig_repository(
|
|
name = "zig_sdk",
|
|
# Pre-release:
|
|
version = "0.9.0-dev.727+aad459836",
|
|
url_format = "https://ziglang.org/builds/zig-{host_platform}-{version}.tar.xz",
|
|
# Release:
|
|
# version = "0.8.0",
|
|
# url_format = "https://ziglang.org/download/{version}/zig-{host_platform}-{version}.tar.xz",
|
|
host_platform_sha256 = {
|
|
"linux-x86_64": "1a0f45e77e2323d4afb3405868c0d96a88170a922eb60fc06f233ac8395fbfd5",
|
|
"macos-x86_64": "cdc76afd3e361c8e217e4d56f2027ec6482d7f612462c27794149b7ad31b9244",
|
|
},
|
|
host_platform_include_root = {
|
|
"macos-x86_64": "lib/zig/",
|
|
"linux-x86_64": "lib/",
|
|
},
|
|
speed_first_safety_later = speed_first_safety_later,
|
|
)
|
|
|
|
toolchains = ["@zig_sdk//:%s_toolchain" % t for t in register]
|
|
native.register_toolchains(*toolchains)
|
|
|
|
ZIG_TOOL_PATH = "tools/{zig_tool}"
|
|
ZIG_TOOL_WRAPPER = """#!/bin/bash
|
|
set -eu
|
|
readonly _zig="{zig}"
|
|
|
|
if [[ -n "$TMPDIR" ]]; then
|
|
_cache_prefix=$TMPDIR
|
|
else
|
|
_cache_prefix="$HOME/.cache"
|
|
if [[ "$(uname)" = Darwin ]]; then
|
|
_cache_prefix="$HOME/Library/Caches"
|
|
fi
|
|
fi
|
|
export ZIG_LOCAL_CACHE_DIR="$_cache_prefix/bazel-zig-cc"
|
|
export ZIG_GLOBAL_CACHE_DIR=$ZIG_LOCAL_CACHE_DIR
|
|
|
|
# https://github.com/ziglang/zig/issues/9431
|
|
exec {maybe_flock} "$_zig" "{zig_tool}" "$@"
|
|
"""
|
|
|
|
_ZIG_TOOLS = [
|
|
"c++",
|
|
"cc",
|
|
"ar",
|
|
"ld.lld", # ELF
|
|
"ld64.lld", # Mach-O
|
|
"lld-link", # COFF
|
|
"wasm-ld", # WebAssembly
|
|
]
|
|
|
|
def _zig_repository_impl(repository_ctx):
|
|
if repository_ctx.os.name.lower().startswith("mac os"):
|
|
host_platform = "macos-x86_64"
|
|
else:
|
|
host_platform = "linux-x86_64"
|
|
|
|
zig_include_root = repository_ctx.attr.host_platform_include_root[host_platform]
|
|
zig_sha256 = repository_ctx.attr.host_platform_sha256[host_platform]
|
|
format_vars = {
|
|
"version": repository_ctx.attr.version,
|
|
"host_platform": host_platform,
|
|
}
|
|
zig_url = repository_ctx.attr.url_format.format(**format_vars)
|
|
|
|
repository_ctx.download_and_extract(
|
|
url = zig_url,
|
|
stripPrefix = "zig-{host_platform}-{version}/".format(**format_vars),
|
|
sha256 = zig_sha256,
|
|
)
|
|
|
|
if repository_ctx.attr.speed_first_safety_later == "auto":
|
|
do_flock = repository_ctx.os.name.lower().startswith("mac os")
|
|
elif repository_ctx.attr.speed_first_safety_later == "yes":
|
|
do_flock = True
|
|
else:
|
|
do_flock = False
|
|
|
|
maybe_flock = 'flock "${_zig}"' if do_flock else ""
|
|
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,
|
|
maybe_flock = maybe_flock,
|
|
),
|
|
)
|
|
|
|
repository_ctx.file(
|
|
"glibc-hacks/fcntl.map",
|
|
content = _fcntl_map,
|
|
)
|
|
repository_ctx.file(
|
|
"glibc-hacks/glibchack-fcntl.h",
|
|
content = _fcntl_h,
|
|
)
|
|
|
|
repository_ctx.template(
|
|
"BUILD.bazel",
|
|
Label("//toolchain:BUILD.sdk.bazel"),
|
|
executable = False,
|
|
substitutions = {
|
|
"{absolute_path}": shell.quote(str(repository_ctx.path(""))),
|
|
"{zig_include_root}": shell.quote(zig_include_root),
|
|
},
|
|
)
|
|
|
|
zig_repository = repository_rule(
|
|
attrs = {
|
|
"version": attr.string(),
|
|
"host_platform_sha256": attr.string_dict(),
|
|
"url_format": attr.string(),
|
|
"host_platform_include_root": attr.string_dict(),
|
|
"speed_first_safety_later": attr.string(
|
|
values = ["yes", "no", "auto"],
|
|
default = "auto",
|
|
doc = "Workaround for github.com/ziglang/zig/issues/9431; " +
|
|
"dramatically decreases compilation time on multi-core " +
|
|
"hosts, but may fail compilation. Then re-run it. So far, " +
|
|
"the author has reproduced this only on OSX.",
|
|
),
|
|
},
|
|
implementation = _zig_repository_impl,
|
|
)
|
|
|
|
def _target_structs():
|
|
ret = []
|
|
for zigcpu, gocpu in (("x86_64", "amd64"), ("aarch64", "arm64")):
|
|
ret.append(_target_darwin(gocpu, zigcpu))
|
|
ret.append(_target_linux_musl(gocpu, zigcpu))
|
|
for glibc in [""] + _GLIBCS:
|
|
ret.append(_target_linux_gnu(gocpu, zigcpu, glibc))
|
|
return ret
|
|
|
|
def filegroup(name, **kwargs):
|
|
native.filegroup(name = name, **kwargs)
|
|
return ":" + name
|
|
|
|
def zig_build_macro(absolute_path, zig_include_root):
|
|
filegroup(name = "empty")
|
|
native.exports_files(["zig"], visibility = ["//visibility:public"])
|
|
filegroup(name = "lib/std", srcs = native.glob(["lib/std/**"]))
|
|
|
|
lazy_filegroups = {}
|
|
|
|
for target_config in _target_structs():
|
|
gotarget = target_config.gotarget
|
|
zigtarget = target_config.zigtarget
|
|
native.platform(
|
|
name = gotarget,
|
|
constraint_values = target_config.constraint_values,
|
|
)
|
|
|
|
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 + "/**"]))
|
|
cxx_builtin_include_directories.append(absolute_path + "/" + d)
|
|
for d in getattr(target_config, "toplevel_include", []):
|
|
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)
|
|
|
|
linkopts = target_config.linkopts
|
|
copts = target_config.copts
|
|
for s in getattr(target_config, "linker_version_scripts", []):
|
|
linkopts = linkopts + ["-Wl,--version-script,%s/%s" % (absolute_path, s)]
|
|
for incl in getattr(target_config, "compiler_extra_includes", []):
|
|
copts = copts + ["-include", absolute_path + "/" + incl]
|
|
|
|
zig_cc_toolchain_config(
|
|
name = zigtarget + "_cc_toolchain_config",
|
|
target = zigtarget,
|
|
tool_paths = absolute_tool_paths,
|
|
cxx_builtin_include_directories = cxx_builtin_include_directories,
|
|
copts = copts,
|
|
linkopts = linkopts,
|
|
target_cpu = target_config.bazel_target_cpu,
|
|
target_system_name = "unknown",
|
|
target_libc = "unknown",
|
|
compiler = "clang",
|
|
abi_version = "unknown",
|
|
abi_libc_version = "unknown",
|
|
)
|
|
|
|
native.cc_toolchain(
|
|
name = zigtarget + "_cc_toolchain",
|
|
toolchain_identifier = zigtarget + "-toolchain",
|
|
toolchain_config = ":%s_cc_toolchain_config" % zigtarget,
|
|
all_files = ":zig",
|
|
ar_files = ":zig",
|
|
compiler_files = ":zig",
|
|
linker_files = ":zig",
|
|
dwp_files = ":empty",
|
|
objcopy_files = ":empty",
|
|
strip_files = ":empty",
|
|
supports_param_files = 0,
|
|
)
|
|
|
|
# register two kinds of toolchain targets: Go and Zig conventions.
|
|
# Go convention: amd64/arm64, linux/darwin
|
|
native.toolchain(
|
|
name = gotarget + "_toolchain",
|
|
exec_compatible_with = None,
|
|
target_compatible_with = target_config.constraint_values,
|
|
toolchain = ":%s_cc_toolchain" % zigtarget,
|
|
toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
|
|
)
|
|
|
|
# Zig convention: x86_64/aarch64, linux/macos
|
|
native.toolchain(
|
|
name = zigtarget + "_toolchain",
|
|
exec_compatible_with = None,
|
|
target_compatible_with = target_config.constraint_values,
|
|
toolchain = ":%s_cc_toolchain" % zigtarget,
|
|
toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
|
|
)
|