| # Copyright 2018 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. |
| |
| """Rule that allows select() to differentiate between compilers.""" |
| |
| load("@bazel_tools//tools/cpp:toolchain_utils.bzl", "find_cpp_toolchain") |
| |
| def _compiler_flag_impl(ctx): |
| toolchain = find_cpp_toolchain(ctx) |
| return [config_common.FeatureFlagInfo(value = toolchain.compiler)] |
| |
| compiler_flag = rule( |
| implementation = _compiler_flag_impl, |
| attrs = { |
| "_cc_toolchain": attr.label(default = Label("@bazel_tools//tools/cpp:current_cc_toolchain")), |
| }, |
| toolchains = [ |
| "@bazel_tools//tools/cpp:toolchain_type", # copybara-use-repo-external-label |
| ], |
| ) |
