Apple Mach-O Linker Error for arm64

Question

I'm trying to integrate a Unity project in my existing native Xcode project. So far I followed this guide to get this working:

http://www.makethegame.net/unity/add-unity3d-to-native-ios-app-with-unity-5-and-vuforia-4-x/

I ran into a lot of issues, but I narrowed it down to the following linker error that I can't get rid of and hope one of you guys can help me with.

 ld: warning: directory not found for option '-L/Users/x/Unity-iPhone.xcodeproj/Libraries/Plugins/iOS'
 ld: warning: directory not found for option '-L/Users/x/Unity-iPhone.xcodeproj/Libraries'
 Undefined symbols for architecture arm64:
   "_UnitySetGraphicsDevice", referenced from:
       -[MyAppController shouldAttachRenderDelegate] in MyUnityAppController.o
   "_UnityRenderEvent", referenced from:
       -[MyAppController shouldAttachRenderDelegate] in MyUnityAppController.o
   "_GetAppController", referenced from:
       -[SecondViewController viewDidLoad] in SecondViewController.o
 ld: symbol(s) not found for architecture arm64

I'm already using IL2CPP for backend scripting and universal architecture. My Unity version is 5.1.1 and I'm using XCode 6.4.

Answer 1

Answer by Sca · Jul 21, 2015 at 01:37 PM

I have exactly the same problem, except only the getAppController error. Seems that the paths "-L/Users/x/Unity-iPhone.xcodeproj/Libraries/Plugins/iOS" and "-L/Users/x/Unity-iPhone.xcodeproj/Libraries" are wrong. Search those in finder and make sure to introduce them corretly. For this i usually put the full path (ie no $(SRCROOT) and the likes), just to try to get it to compile.

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Answer 2

Answer by Kornikolia · Oct 19, 2015 at 11:34 AM

Hi @kgoedecke, Change extension for your ViewControllers files from .m to .mm.

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Apple Mach-O Linker Error for arm64

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