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hermetic_cc_toolchain/toolchain/private/defs.bzl

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Python

_ZIG_TOOL_PATH = "tools/{zigtarget}/{zig_tool}"
# 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",
"2.34",
]
_INCLUDE_TAIL = [
"libcxx/include",
"libcxxabi/include",
"include",
]
LIBCS = ["musl"] + ["gnu.{}".format(glibc) for glibc in _GLIBCS]
def zig_tool_path(os):
if os == "windows":
return _ZIG_TOOL_PATH + ".exe"
else:
return _ZIG_TOOL_PATH
def target_structs():
ret = []
for zigcpu, gocpu in (("x86_64", "amd64"), ("aarch64", "arm64")):
ret.append(_target_macos(gocpu, zigcpu))
ret.append(_target_windows(gocpu, zigcpu))
ret.append(_target_linux_musl(gocpu, zigcpu))
for glibc in _GLIBCS:
ret.append(_target_linux_gnu(gocpu, zigcpu, glibc))
return ret
def _target_macos(gocpu, zigcpu):
min_os = "11"
copts = []
if zigcpu == "aarch64":
copts = ["-mcpu=apple_m1"]
return struct(
gotarget = "darwin_{}".format(gocpu),
zigtarget = "{}-macos-none".format(zigcpu),
includes = [
"libunwind/include",
# TODO: Define a toolchain for each minimum OS version
"libc/include/{}-macos.{}-none".format(zigcpu, min_os),
"libc/include/any-macos.{}-any".format(min_os),
"libc/include/any-macos-any",
] + _INCLUDE_TAIL,
dynamic_library_linkopts = ["-Wl,-undefined=dynamic_lookup"],
copts = copts,
libc = "darwin",
bazel_target_cpu = "darwin",
constraint_values = [
"@platforms//os:macos",
"@platforms//cpu:{}".format(zigcpu),
],
tool_paths = {"ld": "ld64.lld"},
artifact_name_patterns = [
{
"category_name": "dynamic_library",
"prefix": "lib",
"extension": ".dylib",
},
],
)
def _target_windows(gocpu, zigcpu):
return struct(
gotarget = "windows_{}".format(gocpu),
zigtarget = "{}-windows-gnu".format(zigcpu),
includes = [
"libc/mingw",
"libunwind/include",
"libc/include/any-windows-any",
] + _INCLUDE_TAIL,
dynamic_library_linkopts = [],
copts = [],
libc = "mingw",
bazel_target_cpu = "x64_windows",
constraint_values = [
"@platforms//os:windows",
"@platforms//cpu:{}".format(zigcpu),
],
tool_paths = {"ld": "ld64.lld"},
artifact_name_patterns = [
{
"category_name": "static_library",
"prefix": "",
"extension": ".lib",
},
{
"category_name": "dynamic_library",
"prefix": "",
"extension": ".dll",
},
{
"category_name": "executable",
"prefix": "",
"extension": ".exe",
},
],
)
def _target_linux_gnu(gocpu, zigcpu, 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.
fcntl_hack = glibc_version < "2.28"
return struct(
gotarget = "linux_{}_{}".format(gocpu, glibc_suffix),
zigtarget = "{}-linux-{}".format(zigcpu, glibc_suffix),
includes = [
"libc/include/{}-linux-gnu".format(zigcpu),
"libc/include/generic-glibc",
] +
# x86_64-linux-any is x86_64-linux and x86-linux combined.
(["libc/include/x86-linux-any"] if zigcpu == "x86_64" else []) +
(["libc/include/{}-linux-any".format(zigcpu)] if zigcpu != "x86_64" else []) + [
"libc/include/any-linux-any",
] + _INCLUDE_TAIL,
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 [],
dynamic_library_linkopts = [],
copts = [],
libc = "glibc",
bazel_target_cpu = "k8",
constraint_values = [
"@platforms//os:linux",
"@platforms//cpu:{}".format(zigcpu),
],
libc_constraint = "@zig_sdk//libc:{}".format(glibc_suffix),
tool_paths = {"ld": "ld.lld"},
artifact_name_patterns = [],
)
def _target_linux_musl(gocpu, zigcpu):
return struct(
gotarget = "linux_{}_musl".format(gocpu),
zigtarget = "{}-linux-musl".format(zigcpu),
includes = [
"libc/include/{}-linux-musl".format(zigcpu),
"libc/include/generic-musl",
] +
# x86_64-linux-any is x86_64-linux and x86-linux combined.
(["libc/include/x86-linux-any"] if zigcpu == "x86_64" else []) +
(["libc/include/{}-linux-any".format(zigcpu)] if zigcpu != "x86_64" else []) + [
"libc/include/any-linux-any",
] + _INCLUDE_TAIL,
dynamic_library_linkopts = [],
copts = ["-D_LIBCPP_HAS_MUSL_LIBC", "-D_LIBCPP_HAS_THREAD_API_PTHREAD"],
libc = "musl",
bazel_target_cpu = "k8",
constraint_values = [
"@platforms//os:linux",
"@platforms//cpu:{}".format(zigcpu),
],
libc_constraint = "@zig_sdk//libc:musl",
tool_paths = {"ld": "ld.lld"},
artifact_name_patterns = [],
)