Unity 5.3.5 3D/XCode8 Google cardboard build problem

Hi guys I'm having issues building my google cardboard project within xcode8, whenever i build the project this is te following error which i seem to be getting:

Undefined symbols for architecture armv7:

"_endSettingsDialog", referenced from: -[DismissDialogViewController viewDidAppear:] in libvrunity.a(unity.o) ld: symbol(s) not found for architecture armv7 clang: error: linker command failed with exit code 1 (use -v to see invocation) I've been looking around on the forums and seeing people suggesting copying the google cardbord sdk into your project but these are c# for unity so i'm not too sure as to how this would work....