My xcode tips -allow_dead_duplicates can't find , how to resolve?

My beta26 xcode tips can't find -allow_dead_duplicates, how to resolve?

Mixed ObjC ABI, compiled without category class properties. how to resolve this warning?

Mixed ObjC ABI, compiled without category class properties. how to resolve this warning?

Mixed ObjC ABI, compiled without category class properties. how to resolve this warning?