Question Firebase and iOS => symbol(s) not found for architecture arm64

Hello,

I am building an iOS 14 app that uses Firebase (7.5.0) with Unity 2020. When launching into XCode (12.4), I get this compiling error :

Code (csharp):

1. Undefined symbols for architecture arm64:
2.  
3.   "_OBJC_CLASS_$_GKLocalPlayer", referenced from:
4.  
5.       objc-class-ref in libFirebaseCppAuth.a(credential_ios_7e32949a14fe9694040ff5eed8d1b954.o)
6.  
7. ld: symbol(s) not found for architecture arm64

I tried everything ;

- uninstall / reinstall cocoapods
- change the Firebase SDK version
- open the .xcworkspace file instead of xcproject
- add some libraries in the build phases and some entries in the build settings (other linker flags)
- ...

I still can't get it working...

Does someone have the good fix please ?

I am lost...

Thanks a lot

 

I had the same issue, and found the solution here: https://github.com/firebase/quickstart-unity/issues/862#issuecomment-769591776

You need to add the GameKit.framework to the UnityFramework build target in Xcode. I can't figure out why that isn't added automatically, but manually adding it fixes the local build in Xcode.

Update: looks like this is a legit Firebase bug and will be fixed in 7.2.0: https://github.com/firebase/quickstart-unity/issues/954

 

Thank you very much !

Did you also modify the code of the class FIRGameCenterAuthProvider as mentioned in the issue ?

 

I only needed to add the GameKit.framework to get the build working locally. I was not successful, however, in getting Unity Cloud Builds to succeed.

I've rolled back to 7.0.2, and will try again with 7.2.0.

 

Where did you rollback the Firebase SDK version ? In the podfile ?

 

I meant that I went back to the entire SDK, 7.0.2. In my case, I always upgrade and test the latest Firebase SDKs in a git branch, so I was able to just reset the branch to the previous SDK.

I should note that I got 7.1.0 working in Unity Cloud Build. I already had a script to add entitlements for Push Notification and GameCenter, so was able to add a couple of lines to add the GameKit framework to the UnityFramework xcode project. Something like this (your entitlement script may look different):

Code (CSharp):

1.  
2.         Debug.Log("[XcodeEntitlements] Embedding gamekit frameworks into UnityFramework target (REMOVE this patch with Firebase SDK update 7.2.0)");
3.         string unityFrameworkTargetGUID = pbxProject.GetUnityFrameworkTargetGuid();
4.         pbxProject.AddFrameworkToProject(unityFrameworkTargetGUID, "GameKit.framework", true);
5.