| // Copyright 2016 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. |
| |
| package com.google.devtools.build.lib.bazel.rules.cpp; |
| |
| import static com.google.devtools.build.lib.packages.Attribute.attr; |
| import static com.google.devtools.build.lib.syntax.Type.BOOLEAN; |
| |
| import com.google.devtools.build.lib.analysis.BaseRuleClasses; |
| import com.google.devtools.build.lib.analysis.RuleDefinition; |
| import com.google.devtools.build.lib.analysis.RuleDefinitionEnvironment; |
| import com.google.devtools.build.lib.bazel.rules.cpp.BazelCppRuleClasses.CcLibraryBaseRule; |
| import com.google.devtools.build.lib.packages.RuleClass; |
| import com.google.devtools.build.lib.rules.cpp.CppConfiguration; |
| |
| /** Rule definition for the cc_library rule. */ |
| public final class BazelCcLibraryRule implements RuleDefinition { |
| @Override |
| public RuleClass build(RuleClass.Builder builder, RuleDefinitionEnvironment env) { |
| return builder |
| // TODO: Google cc_library overrides documentation for: |
| // deps, data, linkopts, defines, srcs; override here too? |
| |
| .requiresConfigurationFragments(CppConfiguration.class) |
| /*<!-- #BLAZE_RULE(cc_library).ATTRIBUTE(alwayslink) --> |
| If 1, any binary that depends (directly or indirectly) on this C++ |
| library will link in all the object files for the files listed in |
| <code>srcs</code>, even if some contain no symbols referenced by the binary. |
| This is useful if your code isn't explicitly called by code in |
| the binary, e.g., if your code registers to receive some callback |
| provided by some service. |
| |
| <p>If alwayslink doesn't work with VS 2017 on Windows, that is due to a |
| [known issue](https://github.com/bazelbuild/bazel/issues/3949), |
| please upgrade your VS 2017 to the latest version.</p> |
| <!-- #END_BLAZE_RULE.ATTRIBUTE -->*/ |
| .add(attr("alwayslink", BOOLEAN)) |
| .override(attr("linkstatic", BOOLEAN).value(false)) |
| .build(); |
| } |
| |
| @Override |
| public Metadata getMetadata() { |
| return RuleDefinition.Metadata.builder() |
| .name("cc_library") |
| .ancestors(CcLibraryBaseRule.class, BaseRuleClasses.MakeVariableExpandingRule.class) |
| .factoryClass(BazelCcLibrary.class) |
| .build(); |
| } |
| } |