1# Copyright 2018 The Bazel Authors. All rights reserved. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15"""Rule that allows select() to differentiate between compilers.""" 16 17load("@bazel_tools//tools/cpp:toolchain_utils.bzl", "find_cpp_toolchain", "use_cpp_toolchain") 18 19def _compiler_flag_impl(ctx): 20 toolchain = find_cpp_toolchain(ctx) 21 return [config_common.FeatureFlagInfo(value = toolchain.compiler)] 22 23compiler_flag = rule( 24 implementation = _compiler_flag_impl, 25 attrs = { 26 "_cc_toolchain": attr.label(default = Label("@bazel_tools//tools/cpp:current_cc_toolchain")), 27 }, 28 toolchains = use_cpp_toolchain(), 29) 30