Adds deprecation warning for users of output_cpp attribute.

--
MOS_MIGRATED_REVID=124843113

1 files changed, 5 insertions, 0 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/rules/objc/ProtoSupport.java b/src/main/java/com/google/devtools/build/lib/rules/objc/ProtoSupport.java
index 5ee93099ab..79be67af49 100644
--- a/src/main/java/com/google/devtools/build/lib/rules/objc/ProtoSupport.java
+++ b/src/main/java/com/google/devtools/build/lib/rules/objc/ProtoSupport.java
@@ -169,6 +169,11 @@ final class ProtoSupport {
           || attributes.getOptionsFile() != null) {
         ruleContext.ruleError(PORTABLE_PROTO_FILTERS_NOT_EXCLUSIVE_ERROR);
       }
+    } else {
+      if (attributes.outputsCpp()) {
+        ruleContext.ruleWarning("The output_cpp attributes has been deprecated. Please "
+            + "refer to b/29342376 for information on possible alternatives");
+      }
     }
     return this;
   }