I'd be happy to migrate to Xcode 15, but my code doesn't link with Xcode 15, while it works perfectly with Xcode 14.3 During Xcode 15 beta, the same code caused Internal Compiler Error in Xcode, which was fixed until RC and final release, but now it fails with this weird message we currently don't know how to fix (any help would be appreciated).

Now that’s something I can help you with. Please start a new thread with the details. Tag it with Linker so that I see it I did as you asked: https://developer.apple.com/forums/thread/740267

Reported as FB13302674.