XCode 4.5.2 Linker Errors

Question

I am unable build an iOS app out of XCode due to Apple Mach-O Linker Errors. Here are XCode screenshots and also my workflow:

Unity 4

I have pro version of both Unity and the iOS extension

Vuforia 1.5.10 unity extension

XCode 4.5.2

Architectures and Valid Architectures all set to armv7 under Build Settings (Resolved, Unity-Iphone, Unity-Iphone). However, iOS Default is grayed out and I cannot change. It is set to Standard (armv7, armv7s)
- Keep receiving "Apple Mach-O Linker Errors" with regard to Vuforia features

Undefined symbols for architecture armv7:

"_markerGetId", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_qcarSetFrameFormat", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_rendererGetVideoBackgroundCfg", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_imageTrackerDestroyDataSet", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_imageTrackerActivateDataSet", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_cameraDeviceSetFlashTorchMode", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_imageTargetCreateVirtualButton", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_getProjectionGL", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_dataSetGetTrackablesOfType", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_trackerManagerDeinitTracker", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_trackerManagerInitTracker", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_rendererSetVideoBackgroundCfg", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_qcarRequiresAlpha", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_cameraDeviceStartCamera", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_rendererIsVideoBackgroundTextureInfoAvailable", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_dataSetGetNumTrackableType", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_virtualButtonIsEnabled", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_isRendererDirty", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

"_rendererGetVideoBackgroundTextureInfo", referenced from:

  RegisterMonoModules() in RegisterMonoModules.o

Are external libraries compiled to support armv7 and armv7s? — Nekto
You won't get any helpful answers unless you tell us what the undefined symbols are. — rmaddy
The unity tag is for Microsoft Unity. Please don't misuse it. — Lex Li

cregox cregox · Accepted Answer · 2013-08-20T19:35:24

I just went with the same problem and, after couple days, I've finally solved it! Made it work with latest Unity 4.2 and Vuforia 2.6.7

Few probable things that could be causing the issue:

Folder hierarchy: This is the biggest most likely point. Leave it as it is when imported from the packagefile. If you move a single file out of its original place, with a few exceptions, you will get many errors as you've described.
Folder naming: Although I apparently had no issues here, use no spaces. It's advised everywhere (despite the package itself unpacking folders with spaces on it...).
Build Settings / Player Settings: Again, I had no issues here. And I've tried changing them a little on an empty project, which worked with no issue. But, having the wrong setting here can cause such linker errors. Create an open project and try around.

To try again after changing any configuration, use CMD + SHIFT + B and press on Build and Run. It will ask where to save and, if saving on top, select Replace.

And good luck!

XCode 4.5.2 Linker Errors

1 Answers