Compiler optimization levels cause build to fail with linker errors

We're using version 3.0.1.1 on Xcode 8 installed via Carthage.

Our debug schema has been building fine. When attempting to archive the project we were struck with a bunch of linker errors

The problem was the "Optimization Level" for the Swift Compiler.
Setting it to "Fast, Single-File Optimization" or "Fast, Whole Module Optimization" will produce linker errors

Setting SWIFT_OPTIMIZATION_LEVEL = "-Onone" in the build settings solved the problem.

Would really like to have the compiler generate optimized code when releasing