| # Copyright 2022 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. |
| |
| """Starlark implementation of cc_toolchain_alias rule.""" |
| |
| load(":common/cc/semantics.bzl", "semantics") |
| load(":common/cc/cc_helper.bzl", "cc_helper") |
| load(":common/cc/cc_common.bzl", "cc_common") |
| |
| CcToolchainInfo = cc_common.CcToolchainInfo |
| TemplateVariableInfo = _builtins.toplevel.platform_common.TemplateVariableInfo |
| ToolchainInfo = _builtins.toplevel.platform_common.ToolchainInfo |
| |
| def _impl(ctx): |
| cc_toolchain = cc_helper.find_cpp_toolchain(ctx, mandatory = ctx.attr.mandatory) |
| if not cc_toolchain: |
| return [] |
| make_variables = cc_toolchain.get_additional_make_variables() |
| cc_provider_make_variables = cc_helper.get_toolchain_global_make_variables(cc_toolchain) |
| template_variable_info = TemplateVariableInfo(make_variables | cc_provider_make_variables) |
| toolchain = ToolchainInfo( |
| cc = cc_toolchain, |
| cc_provider_in_toolchain = True, |
| ) |
| return [ |
| cc_toolchain, |
| toolchain, |
| template_variable_info, |
| DefaultInfo( |
| files = cc_toolchain.get_all_files_including_libc(), |
| ), |
| ] |
| |
| cc_toolchain_alias = rule( |
| implementation = _impl, |
| fragments = ["cpp", "platform"], |
| attrs = { |
| "mandatory": attr.bool(default = True), |
| "_cc_toolchain": attr.label(default = configuration_field(fragment = "cpp", name = "cc_toolchain"), providers = [CcToolchainInfo]), |
| "_cc_toolchain_type": attr.label(default = "@" + semantics.get_repo() + "//tools/cpp:toolchain_type"), |
| }, |
| toolchains = cc_helper.use_cpp_toolchain() + |
| semantics.get_runtimes_toolchain(), |
| ) |
