How to build Swift 3 project on Xcode 9?

Question

Xcode 9 Release Notes says that Swift 3 compilation is supported:

One compiler for Swift 4 and Swift 3, Swift 4 and Swift 3 targets c

Answer 1

Xcode 9 needs the framework to be built with Swift 3.2 or higher. Go to https://github.com/emaloney/CleanroomLogger and click Download ZIP. Open the xcodeproj in Xcode 9. Press ⌘B. CleanroomLogger.framework turns from red to black. Drag the framework into your project. See related question: Realm issue with Swift 3.1