motiejus/hermetic_cc_toolchain
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Hide toolchain internals

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This commit is contained in:
laurynasl 2022-04-07 10:15:34 +00:00
parent 6ded50ad67
commit 64be98b830
6 changed files with 92 additions and 77 deletions
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10
toolchain/defs.bzl
View File

@ -143,6 +143,7 @@ def _zig_repository_impl(repository_ctx):
Label("//toolchain/platform:BUILD"),
"platform/BUILD",
)
repository_ctx.template(
"BUILD",
Label("//toolchain:BUILD.sdk.bazel"),
@ -152,9 +153,14 @@ def _zig_repository_impl(repository_ctx):
},
)
repository_ctx.template(
repository_ctx.symlink(
Label("//toolchain/toolchain:BUILD"),
"toolchain/BUILD",
Label("//toolchain/toolchain:BUILD.sdk.bazel"),
)
repository_ctx.template(
"private/BUILD",
Label("//toolchain/private:BUILD.sdk.bazel"),
executable = False,
substitutions = {
"{absolute_path}": shell.quote(str(repository_ctx.path(""))),

6
toolchain/private/BUILD.sdk.bazel Normal file
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@ -0,0 +1,6 @@
load("@bazel-zig-cc//toolchain/private:cc_toolchains.bzl", "declare_cc_toolchains")
declare_cc_toolchains(
absolute_path = {absolute_path},
zig_include_root = {zig_include_root},
)

68
toolchain/private/cc_toolchains.bzl Normal file
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@ -0,0 +1,68 @@
load(":defs.bzl", "DEFAULT_INCLUDE_DIRECTORIES", "ZIG_TOOL_PATH", "target_structs")
load("@bazel-zig-cc//toolchain: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()
def declare_cc_toolchains(absolute_path, zig_include_root):
for target_config in target_structs():
gotarget = target_config.gotarget
zigtarget = target_config.zigtarget
cxx_builtin_include_directories = []
for d in DEFAULT_INCLUDE_DIRECTORIES + target_config.includes:
d = zig_include_root + 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_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_identifier = zigtarget + "-toolchain",
toolchain_config = ":%s_cc_config" % zigtarget,
all_files = "@zig_sdk//:zig",
ar_files = "@zig_sdk//:zig",
compiler_files = "@zig_sdk//:zig",
linker_files = "@zig_sdk//:zig",
dwp_files = "@zig_sdk//:empty",
objcopy_files = "@zig_sdk//:empty",
strip_files = "@zig_sdk//:empty",
supports_param_files = 0,
)

7
toolchain/toolchain/BUILD
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@ -0,0 +1,7 @@
load("@bazel-zig-cc//toolchain/toolchain:defs.bzl", "declare_toolchains")
package(
default_visibility = ["//visibility:public"],
)
declare_toolchains()

10
toolchain/toolchain/BUILD.sdk.bazel
View File

@ -1,10 +0,0 @@
load("@bazel-zig-cc//toolchain/toolchain:defs.bzl", "declare_toolchains")
package(
default_visibility = ["//visibility:public"],
)
declare_toolchains(
absolute_path = {absolute_path},
zig_include_root = {zig_include_root},
)

68
toolchain/toolchain/defs.bzl
View File

@ -1,79 +1,17 @@
load("@bazel-zig-cc//toolchain:zig_toolchain.bzl", "zig_cc_toolchain_config")
load("@bazel-zig-cc//toolchain/private:defs.bzl", "DEFAULT_INCLUDE_DIRECTORIES", "ZIG_TOOL_PATH", "target_structs")
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()
def declare_toolchains(absolute_path, zig_include_root):
def declare_toolchains():
for target_config in target_structs():
gotarget = target_config.gotarget
zigtarget = target_config.zigtarget
cxx_builtin_include_directories = []
for d in DEFAULT_INCLUDE_DIRECTORIES + target_config.includes:
d = zig_include_root + 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_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_identifier = zigtarget + "-toolchain",
toolchain_config = ":%s_cc_config" % zigtarget,
all_files = "@zig_sdk//:zig",
ar_files = "@zig_sdk//:zig",
compiler_files = "@zig_sdk//:zig",
linker_files = "@zig_sdk//:zig",
dwp_files = "@zig_sdk//:empty",
objcopy_files = "@zig_sdk//:empty",
strip_files = "@zig_sdk//: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,
exec_compatible_with = None,
target_compatible_with = target_config.constraint_values,
toolchain = ":%s_cc" % zigtarget,
toolchain = "@zig_sdk//private:%s_cc" % zigtarget,
toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
)
@ -82,6 +20,6 @@ def declare_toolchains(absolute_path, zig_include_root):
name = zigtarget,
exec_compatible_with = None,
target_compatible_with = target_config.constraint_values,
toolchain = ":%s_cc" % zigtarget,
toolchain = "@zig_sdk//private:%s_cc" % zigtarget,
toolchain_type = "@bazel_tools//tools/cpp:toolchain_type",
)