`po` gives `error: :1:1: error: use of unresolved identifier`

So it turns out there was probably a bug in the past that when you were adding a Swift file it would add/ask a Bridging header, but it wouldn’t add that line to your project SWIFT_OPTIMIZATION_LEVEL = “-Onone”; which means you’d stay in this state resulting in error: <EXPR>:1:1: error: use of unresolved identifier! I … Read more