How can I print to GK420d over TCP/IP in IOS 10. Apple rejects build.

I have a GK420d and iOS app that prints over TCP/IP to it using the libZSDK_API.a library. Apple just rejected my latest build because it includes the libZSDK_API.a binary. I see the new Link-OS SDK but it doesn't seem to support very many older TCP/IP printers. What can we do in this case?


I'm using iOS 10, Xcode 8 and libZSDK_API.a.