Hello,
I have a Unity project that uses a native Swift + ObjC library that I made using Firebase MLKit. When trying to build for iOS, the Unity project always builds with Xcode 11.3.1, but when updating to any Xcode 12.X version, I get the following errors :
> ld: warning: Could not find or use> auto-linked library 'swiftCoreMIDI'> ld: warning: Could not find or use> auto-linked library> 'swiftUniformTypeIdentifiers'> Undefined symbols for architecture> armv7: > "__swift_FORCE_LOAD_$_swiftUniformTypeIdentifiers",> referenced from:> __swift_FORCE_LOAD_$_swiftUniformTypeIdentifiers_$_NativeLibrary_iOS> in> NativeLibrary_iOS.a(NativeLibrary.o)> __swift_FORCE_LOAD_$_swiftUniformTypeIdentifiers_$_NativeLibrary_iOS> in NativeLibrary_iOS.a(UIImage.o)> (maybe you meant: __swift_FORCE_LOAD_$_swiftUniformTypeIdentifiers_$_NativeLibrary_iOS)> "__swift_FORCE_LOAD_$_swiftCoreMIDI",> referenced from:> __swift_FORCE_LOAD_$_swiftCoreMIDI_$_NativeLibrary_iOS> in> NativeLibrary_iOS.a(NativeLibrary.o)> __swift_FORCE_LOAD_$_swiftCoreMIDI_$_NativeLibrary_iOS> in NativeLibrary_iOS.a(UIImage.o)> (maybe you meant: __swift_FORCE_LOAD_$_swiftCoreMIDI_$_NativeLibrary_iOS)> ld: symbol(s) not found for> architecture armv7 clang: error:> linker command failed with exit code 1> (use -v to see invocation)
I am not using either swiftCoreMIDI nor swiftUniformTypeIdentifiers in my code. For the record, I did recompile my native library with Xcode 12 before importing it again in Unity.
**Things I have tried:**
- Building a Unity project with a Swift library that doesn’t use Firebase MLKit : works fine
- Building an Xcode only project that uses Firebase MLKit : works fine
- Building the project with a more recent Unity version : fails
- Integrating the Firebase SDK frameworks directly instead of using CocoaPods : fails
- Adding an empty Swift file + bridging header to my project : fails
- Adding the user defined setting LD_VERIFY_BITCODE = NO in XCode : fails
**I’m using:**
- Xcode 12.2
- Firebase 6.34
- Swift 5.0
- Unity 2019.3.6f1
Any help would be appreciated, I’ve been stuck on this for a while!
↧