| # Copyright 2019 The Bazel Authors. All rights reserved. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| |
| """Example showing how to get CcToolchainInfo in a custom rule.""" |
| |
| load("@rules_cc//cc:toolchain_utils.bzl", "find_cpp_toolchain") |
| |
| def _write_cc_toolchain_cpu_impl(ctx): |
| cc_toolchain = find_cpp_toolchain(ctx) |
| output = ctx.actions.declare_file(ctx.label.name + "_cpu") |
| ctx.actions.write(output, cc_toolchain.cpu) |
| return [DefaultInfo(files = depset([output]))] |
| |
| # This rule does nothing, just writes the target_cpu from the cc_toolchain used for this build. |
| write_cc_toolchain_cpu = rule( |
| implementation = _write_cc_toolchain_cpu_impl, |
| attrs = { |
| "_cc_toolchain": attr.label(default = Label("@bazel_tools//tools/cpp:current_cc_toolchain")), |
| }, |
| toolchains = ["@bazel_tools//tools/cpp:toolchain_type"], |
| ) |