125 lines
4.0 KiB
Python
125 lines
4.0 KiB
Python
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DEFAULT_INCLUDE_DIRECTORIES = [
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"include",
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"libcxx/include",
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"libcxxabi/include",
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]
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ZIG_TOOL_PATH = "tools/{zig_tool}"
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# Zig supports even older glibcs than defined below, but we have tested only
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# down to 2.17.
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# $ zig targets | jq -r '.glibc[]' | sort -V
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_GLIBCS = [
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"2.17",
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"2.18",
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"2.19",
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"2.22",
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"2.23",
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"2.24",
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"2.25",
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"2.26",
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"2.27",
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"2.28",
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"2.29",
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"2.30",
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"2.31",
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"2.32",
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"2.33",
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"2.34",
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]
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def target_structs():
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ret = []
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for zigcpu, gocpu in (("x86_64", "amd64"), ("aarch64", "arm64")):
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ret.append(_target_darwin(gocpu, zigcpu))
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ret.append(_target_linux_musl(gocpu, zigcpu))
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for glibc in [""] + _GLIBCS:
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ret.append(_target_linux_gnu(gocpu, zigcpu, glibc))
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return ret
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def _target_darwin(gocpu, zigcpu):
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min_os = "10"
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if zigcpu == "aarch64":
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min_os = "11"
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return struct(
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gotarget = "darwin_{}".format(gocpu),
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zigtarget = "{}-macos-gnu".format(zigcpu),
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includes = [
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"libunwind/include",
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# TODO: Define a toolchain for each minimum OS version
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"libc/include/{}-macos.{}-gnu".format(zigcpu, min_os),
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"libc/include/any-macos.{}-any".format(min_os),
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"libc/include/any-macos-any",
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],
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linkopts = [],
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copts = [],
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bazel_target_cpu = "darwin",
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constraint_values = [
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"@platforms//os:macos",
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"@platforms//cpu:{}".format(zigcpu),
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],
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tool_paths = {"ld": "ld64.lld"},
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)
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def _target_linux_gnu(gocpu, zigcpu, glibc_version = ""):
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glibc_suffix = "gnu"
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if glibc_version != "":
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glibc_suffix = "gnu.{}".format(glibc_version)
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# https://github.com/ziglang/zig/issues/5882#issuecomment-888250676
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# fcntl_hack is only required for glibc 2.27 or less. We assume that
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# glibc_version == "" (autodetect) is running a recent glibc version, thus
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# adding this hack only when glibc is explicitly 2.27 or lower.
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fcntl_hack = False
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if glibc_version == "":
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# zig doesn't reliably detect the glibc version, so
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# often falls back to 2.17; the hack should be included.
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# https://github.com/ziglang/zig/issues/6469
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fcntl_hack = True
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else:
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# hack is required for 2.27 or less.
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fcntl_hack = glibc_version < "2.28"
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return struct(
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gotarget = "linux_{}_{}".format(gocpu, glibc_suffix),
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zigtarget = "{}-linux-{}".format(zigcpu, glibc_suffix),
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includes = [
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"libunwind/include",
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"libc/include/generic-glibc",
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"libc/include/any-linux-any",
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"libc/include/{}-linux-gnu".format(zigcpu),
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"libc/include/{}-linux-any".format(zigcpu),
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] + (["libc/include/x86-linux-any"] if zigcpu == "x86_64" else []),
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toplevel_include = ["glibc-hacks"] if fcntl_hack else [],
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compiler_extra_includes = ["glibc-hacks/glibchack-fcntl.h"] if fcntl_hack else [],
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linker_version_scripts = ["glibc-hacks/fcntl.map"] if fcntl_hack else [],
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linkopts = ["-lc++", "-lc++abi"],
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copts = [],
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bazel_target_cpu = "k8",
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constraint_values = [
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"@platforms//os:linux",
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"@platforms//cpu:{}".format(zigcpu),
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],
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tool_paths = {"ld": "ld.lld"},
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)
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def _target_linux_musl(gocpu, zigcpu):
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return struct(
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gotarget = "linux_{}_musl".format(gocpu),
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zigtarget = "{}-linux-musl".format(zigcpu),
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includes = [
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"libc/include/generic-musl",
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"libc/include/any-linux-any",
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"libc/include/{}-linux-musl".format(zigcpu),
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"libc/include/{}-linux-any".format(zigcpu),
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] + (["libc/include/x86-linux-any"] if zigcpu == "x86_64" else []),
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linkopts = ["-s", "-w"],
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copts = ["-D_LIBCPP_HAS_MUSL_LIBC", "-D_LIBCPP_HAS_THREAD_API_PTHREAD"],
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bazel_target_cpu = "k8",
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constraint_values = [
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"@platforms//os:linux",
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"@platforms//cpu:{}".format(zigcpu),
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],
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tool_paths = {"ld": "ld.lld"},
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)
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