mirror of
https://github.com/bazelbuild/rules_cc
synced 2024-11-30 22:41:22 +00:00
78 lines
2.4 KiB
Python
78 lines
2.4 KiB
Python
"""Sample Starlark definition defining a C++ toolchain's behavior.
|
|
|
|
When you build a cc_* rule, this logic defines what programs run for what
|
|
build steps (e.g. compile / link / archive) and how their command lines are
|
|
structured.
|
|
|
|
This is a proof-of-concept simple implementation. It doesn't construct fancy
|
|
command lines and uses mock shell scripts to compile and link
|
|
("sample_compiler" and "sample_linker"). See
|
|
https://docs.bazel.build/versions/main/cc-toolchain-config-reference.html and
|
|
https://docs.bazel.build/versions/main/tutorial/cc-toolchain-config.html for
|
|
advanced usage.
|
|
"""
|
|
|
|
load("@bazel_tools//tools/cpp:cc_toolchain_config_lib.bzl", "tool_path")
|
|
|
|
def _impl(ctx):
|
|
tool_paths = [
|
|
tool_path(
|
|
name = "ar",
|
|
path = "sample_linker",
|
|
),
|
|
tool_path(
|
|
name = "cpp",
|
|
path = "not_used_in_this_example",
|
|
),
|
|
tool_path(
|
|
name = "gcc",
|
|
path = "sample_compiler",
|
|
),
|
|
tool_path(
|
|
name = "gcov",
|
|
path = "not_used_in_this_example",
|
|
),
|
|
tool_path(
|
|
name = "ld",
|
|
path = "sample_linker",
|
|
),
|
|
tool_path(
|
|
name = "nm",
|
|
path = "not_used_in_this_example",
|
|
),
|
|
tool_path(
|
|
name = "objdump",
|
|
path = "not_used_in_this_example",
|
|
),
|
|
tool_path(
|
|
name = "strip",
|
|
path = "not_used_in_this_example",
|
|
),
|
|
]
|
|
|
|
# Documented at
|
|
# https://docs.bazel.build/versions/main/skylark/lib/cc_common.html#create_cc_toolchain_config_info.
|
|
#
|
|
# create_cc_toolchain_config_info is the public interface for registering
|
|
# C++ toolchain behavior.
|
|
return cc_common.create_cc_toolchain_config_info(
|
|
ctx = ctx,
|
|
toolchain_identifier = "custom-toolchain-identifier",
|
|
host_system_name = "local",
|
|
target_system_name = "local",
|
|
target_cpu = "sample_cpu",
|
|
target_libc = "unknown",
|
|
compiler = "gcc",
|
|
abi_version = "unknown",
|
|
abi_libc_version = "unknown",
|
|
tool_paths = tool_paths,
|
|
)
|
|
|
|
cc_toolchain_config = rule(
|
|
implementation = _impl,
|
|
# You can alternatively define attributes here that make it possible to
|
|
# instantiate different cc_toolchain_config targets with different behavior.
|
|
attrs = {},
|
|
provides = [CcToolchainConfigInfo],
|
|
)
|