Warnings from libiomp5.a when linking on Macintosh with Xcode 8

We are using MKL and linking with libiomp5.a. Since starting to use Xcode 8.3.3 to build, we have been getting a large number of warnings like this:

:-1: warning: pointer not aligned at address 0x11132A942 (anon + 112 from ...libs/libiomp5.a(iomp.o))

Does anyone know how to silence this?

Thanks, John Weeks