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Question by poopy_nooby · Jun 02, 2018 at 04:56 AM · xcodelinker

Apple Mach-O Linker(Id) Error when building Unity project

I am trying to build a Unity AR project onto my iPhone SE. However, I am getting the following error.

 Undefined symbols for architecture arm64:
   "void RegisterClass<WorldAnchor>(char const*)", referenced from:
       RegisterAllClasses() in UnityClassRegistration.o
 ld: symbol(s) not found for architecture arm64
 clang: error: linker command failed with exit code 1 (use -v to see invocation)
 

I checked and found there is a cpp file UnityClassRegistration under the Native folder. It has a line class WorldAnchor; template <> void RegisterClass<WorldAnchor>(const char*); I am on Unity 2018.1.1 . Removing the class WorldAnchor lets me get past this error. But I want to know why this error is appearing in the first place. Do I need to add something to the Unity scene to get past this error? My Xcode version is 9.4 .

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avatar image marrington · Aug 06, 2018 at 09:11 PM 0
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We are hitting the same error on both IOS and Android IL2CPP builds. I don't think we are directly using this class anywhere in our project.

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Answer by Fungi · Aug 13, 2018 at 11:30 PM

Had this same issue. Fixed it by grabbing the latest from BitBucket instead of the ARKit plugin version that's on the asset store.

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