2 files changed, 38 insertions, 0 deletions
diff --git a/src/main/java/com/google/devtools/build/lib/bazel/rules/CcRules.java b/src/main/java/com/google/devtools/build/lib/bazel/rules/CcRules.java
index be7f016365..7d2775f122 100644
--- a/src/main/java/com/google/devtools/build/lib/bazel/rules/CcRules.java
+++ b/src/main/java/com/google/devtools/build/lib/bazel/rules/CcRules.java
@@ -25,6 +25,7 @@ import com.google.devtools.build.lib.bazel.rules.cpp.BazelCppRuleClasses;
 import com.google.devtools.build.lib.rules.core.CoreRules;
 import com.google.devtools.build.lib.rules.cpp.CcHostToolchainAliasRule;
 import com.google.devtools.build.lib.rules.cpp.CcImportRule;
+import com.google.devtools.build.lib.rules.cpp.CcLibcTopAlias;
 import com.google.devtools.build.lib.rules.cpp.CcModule;
 import com.google.devtools.build.lib.rules.cpp.CcToolchainAliasRule;
 import com.google.devtools.build.lib.rules.cpp.CcToolchainRule;
@@ -59,6 +60,7 @@ public class CcRules implements RuleSet {
     builder.addRuleDefinition(new CcToolchainSuiteRule());
     builder.addRuleDefinition(new CcToolchainAliasRule());
     builder.addRuleDefinition(new CcHostToolchainAliasRule());
+    builder.addRuleDefinition(new CcLibcTopAlias());
     builder.addRuleDefinition(new CcImportRule());
     builder.addRuleDefinition(new CcToolchainTypeRule());
     builder.addRuleDefinition(new BazelCppRuleClasses.CcLinkingRule());
diff --git a/src/main/java/com/google/devtools/build/lib/rules/cpp/CcLibcTopAlias.java b/src/main/java/com/google/devtools/build/lib/rules/cpp/CcLibcTopAlias.java
new file mode 100644
index 0000000000..14b866b982
--- /dev/null
+++ b/src/main/java/com/google/devtools/build/lib/rules/cpp/CcLibcTopAlias.java
@@ -0,0 +1,36 @@
+// Copyright 2017 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.packages.Attribute.LabelLateBoundDefault;
+import com.google.devtools.build.lib.rules.LateBoundAlias.CommonAliasRule;
+
+/** Implementation of the {@code cc_libc_top_alias} rule. */
+public class CcLibcTopAlias extends CommonAliasRule {
+
+  public CcLibcTopAlias() {
+    super(
+        "cc_libc_top_alias",
+        env -> CcLibcTopAlias.getSysrootAttribute(),
+        CppConfiguration.class);
+  }
+
+  private static LabelLateBoundDefault<CppConfiguration> getSysrootAttribute() {
+    return LabelLateBoundDefault.fromTargetConfiguration(
+        CppConfiguration.class,
+        null,
+        (rules, attributes, cppConfig) -> cppConfig.getSysrootLabel());
+  }
+}