| // Copyright 2014 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.rules.cpp; |
| |
| import com.google.devtools.build.lib.analysis.config.BuildConfiguration; |
| import com.google.devtools.build.lib.analysis.config.BuildConfiguration.Options; |
| import com.google.devtools.build.lib.analysis.config.BuildOptions; |
| import com.google.devtools.build.lib.view.config.crosstool.CrosstoolConfig.CToolchain; |
| import java.util.Objects; |
| |
| /** |
| * Contains parameters which uniquely describe a crosstool configuration |
| * and methods for comparing two crosstools against each other. |
| * |
| * <p>Two crosstools which contain equivalent values of these parameters are |
| * considered equal. |
| */ |
| public final class CrosstoolConfigurationIdentifier implements CrosstoolConfigurationOptions { |
| /** The CPU associated with this crosstool configuration. */ |
| private final String cpu; |
| |
| /** The compiler (e.g. gcc) associated with this crosstool configuration. */ |
| private final String compiler; |
| |
| /** The version of libc (e.g. glibc-2.11) associated with this crosstool configuration. */ |
| private final String libc; |
| |
| /** Creates a new {@link CrosstoolConfigurationIdentifier} with the given parameters. */ |
| CrosstoolConfigurationIdentifier(String cpu, String compiler, String libc) { |
| this.cpu = cpu; |
| this.compiler = compiler; |
| this.libc = libc; |
| } |
| |
| /** |
| * Creates a new crosstool configuration from the given crosstool release and |
| * configuration options. |
| */ |
| public static CrosstoolConfigurationIdentifier fromOptions(BuildOptions buildOptions) { |
| Options options = buildOptions.get(BuildConfiguration.Options.class); |
| CppOptions cppOptions = buildOptions.get(CppOptions.class); |
| return new CrosstoolConfigurationIdentifier( |
| options.cpu, cppOptions.cppCompiler, cppOptions.glibc); |
| } |
| |
| public static CrosstoolConfigurationIdentifier fromToolchain(CToolchain toolchain) { |
| return new CrosstoolConfigurationIdentifier( |
| toolchain.getTargetCpu(), toolchain.getCompiler(), toolchain.getTargetLibc()); |
| } |
| |
| @Override |
| public boolean equals(Object other) { |
| if (!(other instanceof CrosstoolConfigurationIdentifier)) { |
| return false; |
| } |
| CrosstoolConfigurationIdentifier otherCrosstool = (CrosstoolConfigurationIdentifier) other; |
| return Objects.equals(cpu, otherCrosstool.cpu) |
| && Objects.equals(compiler, otherCrosstool.compiler) |
| && Objects.equals(libc, otherCrosstool.libc); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(cpu, compiler, libc); |
| } |
| |
| |
| /** |
| * Returns a series of command line flags which specify the configuration options. |
| * Any of these options may be null, in which case its flag is omitted. |
| * |
| * <p>The appended string will be along the lines of |
| * " --cpu='cpu' --compiler='compiler' --glibc='libc'". |
| */ |
| public String describeFlags() { |
| StringBuilder message = new StringBuilder(); |
| if (getCpu() != null) { |
| message.append(" --cpu='").append(getCpu()).append("'"); |
| } |
| if (getCompiler() != null) { |
| message.append(" --compiler='").append(getCompiler()).append("'"); |
| } |
| if (getLibc() != null) { |
| message.append(" --glibc='").append(getLibc()).append("'"); |
| } |
| return message.toString(); |
| } |
| |
| /** Returns true if the specified toolchain is a candidate for use with this crosstool. */ |
| public boolean isCandidateToolchain(CToolchain toolchain) { |
| return (toolchain.getTargetCpu().equals(getCpu()) |
| && (getLibc() == null || toolchain.getTargetLibc().equals(getLibc())) |
| && (getCompiler() == null || toolchain.getCompiler().equals( |
| getCompiler()))); |
| } |
| |
| @Override |
| public String toString() { |
| return describeFlags(); |
| } |
| |
| @Override |
| public String getCpu() { |
| return cpu; |
| } |
| |
| @Override |
| public String getCompiler() { |
| return compiler; |
| } |
| |
| @Override |
| public String getLibc() { |
| return libc; |
| } |
| } |