1 files changed, 3 insertions, 0 deletions
diff --git a/lib/Sema/SemaDeclObjC.cpp b/lib/Sema/SemaDeclObjC.cpp
index 3bbe421cd1..3052b826b6 100644
--- a/lib/Sema/SemaDeclObjC.cpp
+++ b/lib/Sema/SemaDeclObjC.cpp
@@ -1076,6 +1076,9 @@ void Sema::CheckImplementationIvars(ObjCImplementationDecl *ImpDecl,
 
 void Sema::WarnUndefinedMethod(SourceLocation ImpLoc, ObjCMethodDecl *method,
                                bool &IncompleteImpl, unsigned DiagID) {
+  // No point warning no definition of method which is 'unavailable'.
+  if (method->hasAttr<UnavailableAttr>())
+    return;
   if (!IncompleteImpl) {
     Diag(ImpLoc, diag::warn_incomplete_impl);
     IncompleteImpl = true;