Add a toolchains= attribute to *_binary, *_test, cc_library and extra_action rules to declare which Make variables they need.

The idea is that they would depend on the future java_runtime_alias / cc_toolchain_alias and similar rules and thus Bazel will know which Make variables they actually need instead of pulling in the whole BuildConfiguration and also making it possible to compute these Make variables during analysis instead of configuration creation.

RELNOTES: None.
PiperOrigin-RevId: 161785868

1 files changed, 1 insertions, 1 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcLibraryRule.java b/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcLibraryRule.java
index 249f27ac7b..5aa9546fb3 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcLibraryRule.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/objc/ObjcLibraryRule.java
@@ -51,7 +51,7 @@ public class ObjcLibraryRule implements RuleDefinition {
         .name("objc_library")
         .factoryClass(ObjcLibrary.class)
         .ancestors(BaseRuleClasses.BaseRule.class, ObjcRuleClasses.CompilingRule.class,
-            ObjcRuleClasses.AlwaysLinkRule.class)
+            ObjcRuleClasses.AlwaysLinkRule.class, BaseRuleClasses.MakeVariableExpandingRule.class)
         .build();
   }
 }