Undefined symbols for architecture arm64:
    Error: "_OBJC_CLASS_$_AVCaptureVideoDataOutput", referenced from:     objc-class-ref in libavdevice.a(avfoundation.o);
      Error: "_OBJC_EHTYPE_$_NSException", referenced from:     GCC_except_table6 in libavdevice.a(avfoundation.o);
      Error: "_OBJC_CLASS_$_NSObject", referenced from:     _OBJC_CLASS_$_AVFFrameReceiver in libavdevice.a(avfoundation.o);     _OBJC_CLASS_$_AVFAudioReceiver in libavdevice.a(avfoundation.o);     _OBJC_CLASS_$_UIKit_UIAlertViewDelegate in libSDL2.a(SDL_uikitmessagebox.o);     _OBJC_CLASS_$_SDLUIAccelerationDelegate in libSDL2.a(SDLUIAccelerationDelegate.o);
      Error: "_OBJC_CLASS_$_AVCaptureDeviceInput", referenced from:     objc-class-ref in libavdevice.a(avfoundation.o);
      Error: "_OBJC_METACLASS_$_NSObject", referenced from:     _OBJC_METACLASS_$_AVFFrameReceiver in libavdevice.a(avfoundation.o);     _OBJC_METACLASS_$_AVFAudioReceiver in libavdevice.a(avfoundation.o);     _OBJC_METACLASS_$_UIKit_UIAlertViewDelegate in libSDL2.a(SDL_uikitmessagebox.o);     _OBJC_METACLASS_$_SDLUIAccelerationDelegate in libSDL2.a(SDLUIAccelerationDelegate.o);     _OBJC_METACLASS_$_SDL_uikitview in libSDL2.a(SDL_uikitview.o);     _OBJC_METACLASS_$_SDL_uikitopenglview in libSDL2.a(SDL_uikitopenglview.o);     _OBJC_METACLASS_$_SDL_uikitviewcontroller in libSDL2.a(SDL_uikitviewcontroller.o);     ...
    Error: "_OBJC_CLASS_$_AVCaptureSession", referenced from:     objc-class-ref in libavdevice.a(avfoundation.o);
      Error: "_OBJC_CLASS_$_AVCaptureDevice", referenced from:     objc-class-ref in libavdevice.a(avfoundation.o);
      Error: "_OBJC_CLASS_$_NSAutoreleasePool", referenced from:     objc-class-ref in libavdevice.a(avfoundation.o);     objc-class-ref in libSDL2.a(SDL_rwopsbundlesupport.o);     objc-class-ref in libSDL2.a(SDL_uikitmessagebox.o);
      Error: "_OBJC_CLASS_$_CAEAGLLayer", referenced from:     objc-class-ref in libSDL2.a(SDL_uikitopenglview.o);
      Error: "_OBJC_CLASS_$_NSNumber", referenced from:     objc-class-ref in libavdevice.a(avfoundation.o);     objc-class-ref in libSDL2.a(SDL_uikitopenglview.o);
      Error: "_OBJC_CLASS_$_NSOperationQueue", referenced from:     objc-class-ref in libSDL2.a(SDL_uikitview.o);
      Error: "_OBJC_CLASS_$_NSDictionary", referenced from:     objc-class-ref in libavdevice.a(avfoundation.o);     objc-class-ref in libSDL2.a(SDL_uikitopenglview.o);
      Error: "_OBJC_CLASS_$_AVCaptureAudioDataOutput", referenced from:     objc-class-ref in libavdevice.a(avfoundation.o);
      Error: "__ZdlPv", referenced from:     _ModPlug_Load in libSDL2_mixer.a(modplug.o);     _ModPlug_Unload in libSDL2_mixer.a(modplug.o);     __ZN10CSoundFile7DestroyEv in libSDL2_mixer.a(sndfile.o);
      Error: "_OBJC_CLASS_$_NSCharacterSet", referenced from:     objc-class-ref in libSDL2.a(SDL_uikitviewcontroller.o);
      Error: "__Znwm", referenced from:     _ModPlug_Load in libSDL2_mixer.a(modplug.o);     __ZN10CSoundFile7ReadMDLEPKhj in libSDL2_mixer.a(load_mdl.o);     __ZN10CSoundFile6ReadITEPKhj in libSDL2_mixer.a(load_it.o);     __ZN10CSoundFile8ReadAMS2EPKhj in libSDL2_mixer.a(load_ams.o);     __ZN10CSoundFile6ReadXMEPKhj in libSDL2_mixer.a(load_xm.o);     __ZN10CSoundFile7ReadDBMEPKhj in libSDL2_mixer.a(load_dbm.o);     __ZN10CSoundFile7ReadMT2EPKhj in libSDL2_mixer.a(load_mt2.o);     ...
    Error: "_OBJC_CLASS_$_NSFileManager", referenced from:     objc-class-ref in libSDL2.a(SDL_rwopsbundlesupport.o);
      Error: "_OBJC_CLASS_$_NSBundle", referenced from:     objc-class-ref in libSDL2.a(SDL_rwopsbundlesupport.o);
      Error: "_OBJC_CLASS_$_UIView", referenced from:     _OBJC_CLASS_$_SDL_uikitview in libSDL2.a(SDL_uikitview.o);
      Error: "_OBJC_CLASS_$_UIAlertView", referenced from:     objc-class-ref in libSDL2.a(SDL_uikitmessagebox.o);
      Error: "_OBJC_CLASS_$_NSRunLoop", referenced from:     objc-class-ref in libSDL2.a(SDL_uikitmessagebox.o);     objc-class-ref in libSDL2.a(SDL_uikitopenglview.o);
      Error: "_OBJC_CLASS_$_NSString", referenced from:     objc-class-ref in libSDL2.a(SDL_uikitmessagebox.o);     objc-class-ref in libSDL2.a(SDL_uikitviewcontroller.o);
      Error: "_OBJC_CLASS_$_NSDate", referenced from:     objc-class-ref in libSDL2.a(SDL_uikitmessagebox.o);
      Error: "_OBJC_CLASS_$_UIAccelerometer", referenced from:     objc-class-ref in libSDL2.a(SDLUIAccelerationDelegate.o);
      Error: "_OBJC_CLASS_$_UIScreen", referenced from:     objc-class-ref in libSDL2.a(SDL_uikitwindow.o);     objc-class-ref in libSDL2.a(SDL_uikitopengles.o);     objc-class-ref in libSDL2.a(SDL_uikitmodes.o);     objc-class-ref in libSDL2.a(SDL_uikitview.o);
      Error: "_OBJC_CLASS_$_UIDevice", referenced from:     objc-class-ref in libSDL2.a(SDL_uikitviewcontroller.o);     objc-class-ref in libSDL2.a(SDL_syspower.o);
      Error: "_OBJC_CLASS_$_UIApplication", referenced from:     objc-class-ref in libSDL2.a(SDL_uikitwindow.o);     objc-class-ref in libSDL2.a(SDL_uikitmodes.o);     objc-class-ref in libSDL2.a(SDL_uikitview.o);
      Error: "_OBJC_CLASS_$_UIWindow", referenced from:     objc-class-ref in libSDL2.a(SDL_uikitwindow.o);
      Error: "_OBJC_CLASS_$_EAGLContext", referenced from:     objc-class-ref in libSDL2.a(SDL_uikitopengles.o);     objc-class-ref in libSDL2.a(SDL_uikitopenglview.o);
      Error: "_OBJC_METACLASS_$_UIView", referenced from:     _OBJC_METACLASS_$_SDL_uikitview in libSDL2.a(SDL_uikitview.o);
      Error: "_OBJC_CLASS_$_UITextField", referenced from:     objc-class-ref in libSDL2.a(SDL_uikitview.o);
      Error: "_OBJC_CLASS_$_NSNotificationCenter", referenced from:     objc-class-ref in libSDL2.a(SDL_uikitview.o);
      Error: "__ZdaPv", referenced from:     __ZN10CSoundFile7DestroyEv in libSDL2_mixer.a(sndfile.o);     __ZN10CSoundFile11FreePatternEPv in libSDL2_mixer.a(sndfile.o);     __ZN10CSoundFile14SetPatternNameEjPKc in libSDL2_mixer.a(sndfile.o);     __ZN10CSoundFile7ReadMDLEPKhj in libSDL2_mixer.a(load_mdl.o);     __Z9AMSUnpackPKcjPcjc in libSDL2_mixer.a(load_ams.o);     __ZN10CSoundFile7ReadAMFEPKhj in libSDL2_mixer.a(load_amf.o);
      Error: "__Znam", referenced from:     __ZN10CSoundFile15AllocatePatternEjj in libSDL2_mixer.a(sndfile.o);     __ZN10CSoundFile14SetPatternNameEjPKc in libSDL2_mixer.a(sndfile.o);     __ZN10CSoundFile7ReadMDLEPKhj in libSDL2_mixer.a(load_mdl.o);     __ZN10CSoundFile6ReadITEPKhj in libSDL2_mixer.a(load_it.o);     __ZN10CSoundFile14LoadMixPluginsEPKvj in libSDL2_mixer.a(load_it.o);     __ZN10CSoundFile7ReadAMSEPKhj in libSDL2_mixer.a(load_ams.o);     __ZN10CSoundFile8ReadAMS2EPKhj in libSDL2_mixer.a(load_ams.o);     ...
    Error: "_OBJC_METACLASS_$_UIViewController", referenced from:     _OBJC_METACLASS_$_SDL_uikitviewcontroller in libSDL2.a(SDL_uikitviewcontroller.o);
      Error: "_OBJC_CLASS_$_UIViewController", referenced from:     _OBJC_CLASS_$_SDL_uikitviewcontroller in libSDL2.a(SDL_uikitviewcontroller.o);