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