Module compiled with Swift 5.1 cannot be imported by the Swift 5.1.2 compiler

by

OK, Turns out if you watch the WWDC video, they explain it:
https://developer.apple.com/videos/play/wwdc2019/416/

You need to set the Build Settings > Build Options > Build Libraries for Distribution option to Yes in your framework’s build settings, otherwise the swift compiler doesn’t generate the neccessary .swiftinterface files which are the key to future compilers being able to load your old library.

This ends up in your project.pbxproj file as:

BUILD_LIBRARY_FOR_DISTRIBUTION = YES;

After setting this flag, a framework I compiled using Xcode 11.0 (swift 5.1) was able to be used by Xcode 11.2 (swift 5.1.2) and everything appears to be working correctly.

Hopefully this question/answer will serve as a useful reference for everyone who hasn’t watched all the WWDC videos

If the error still persists go to Product > Clean Build Folder and Build again.

More Related Contents:

  1. Building a universal swift framework
  2. dyld: Library not loaded: @rpath/libswiftCore.dylib
  3. Check for internet connection with Swift
  4. How do I install CocoaPods?
  5. Get the length of a String
  6. Implicitly unwrapped optional assign in Xcode 8
  7. Unable to run app in Simulator: Xcode beta 6 iOS 8
  8. How to program a delay in Swift 3
  9. Xcode iOS 8 Keyboard types not supported
  10. How to dismiss ViewController in Swift?
  11. Invalid Swift Support – Files don’t match
  12. Invalid Swift Support / invalid implementation of swift
  13. Remove text from Back button keeping the icon
  14. Xcode Canvas for SwiftUI previews does not show up
  15. Xcode – Error creating LLDB target
  16. How can I programmatically determine if my app is running in the iphone simulator?
  17. SwiftUI – how to avoid navigation hardcoded into the view?
  18. Programmatically Add CenterX/CenterY Constraints
  19. OpenURL in iOS10
  20. How Do I Create a Development Framework In iOS Including Swift?
  21. Could not find module for target ‘x86_64-apple-ios-simulator’
  22. Show iPhone cut copy paste menu on UILabel
  23. iOS11 photo library access is possible even if settings are set to “never”
  24. “No such module ‘Alamofire'” Xcode won’t recognize Alamofire framework
  25. Xcode 6 Storyboard Unwind Segue with Swift Not Connecting to Exit
  26. Signing sub-framework embedded in root-framework not working (Xcode 11.2.1)
  27. Setting up UIScrollView to swipe between 3 view controllers
  28. Detect touch on child node of object in SpriteKit
  29. arc4random_uniform not available in Xcode 7.0 beta (7a176x) on OSX 10.10.4
  30. Can we detect whether a user left through the home button or lock button without listening to darwin notifications?

Leave a Comment