Undefined symbols for architecture i386

Question

Possible Duplicate:
symbol(s) not found for architecture i386

I have an app to complete, and when I start trying to understand what the previous developer did (it was done with Xcode 3 I think) by executing the simulator, Xcode 4 show me 25 issues:

    Ld build/Debug-iphonesimulator/RadioPlayer.app/RadioPlayer normal i386
    cd /Users/haithembenhammouda/Desktop/SonVidéo
    setenv MACOSX_DEPLOYMENT_TARGET 10.6
    setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc-4.2 -arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk -L/Users/haithembenhammouda/Desktop/SonVidéo/build/Debug-iphonesimulator -L/Users/haithembenhammouda/Desktop/SonVidéo/Classes/RadioKitLib -L/Users/haithembenhammouda/Desktop/SonVidéo -F/Users/haithembenhammouda/Desktop/SonVidéo/build/Debug-iphonesimulator -filelist /Users/haithembenhammouda/Desktop/SonVidéo/build/SonVidéo.build/Debug-iphonesimulator/RadioPlayer.build/Objects-normal/i386/RadioPlayer.LinkFileList -mmacosx-version-min=10.6 -ObjC -Xlinker -objc_abi_version -Xlinker 2 -framework Foundation -framework UIKit -framework CoreGraphics -framework SystemConfiguration -framework MediaPlayer -framework CFNetwork -framework AudioToolbox -framework QuartzCore -lsqlite3.0 -framework AVFoundation -lRadioKit -framework MessageUI -o /Users/haithembenhammouda/Desktop/SonVidéo/build/Debug-iphonesimulator/RadioPlayer.app/RadioPlayer
Undefined symbols for architecture i386:
  "_OBJC_CLASS_$_RadioKit", referenced from:
      objc-class-ref in RadioPlayerViewController.o
  ".objc_class_name_UIColor", referenced from:
      pointer-to-literal-objc-class-name in libRadioKit.a(BufferView.o)
  ".objc_class_name_UIView", referenced from:
      .objc_class_name_BufferView in libRadioKit.a(BufferView.o)
  ".objc_class_name_NSObject", referenced from:
      .objc_class_name_ASE_Event in libRadioKit.a(ASE_Event.o)
      .objc_class_name_AudioStreamEngine in libRadioKit.a(AudioStreamEngine.o)
      .objc_class_name_RadioKit in libRadioKit.a(RadioKit.o)
      .objc_class_name_XMLMetaParser in libRadioKit.a(XMLMetaParser.o)
  ".objc_class_name_NSDate", referenced from:
      pointer-to-literal-objc-class-name in libRadioKit.a(AudioStreamEngine.o)
  ".objc_class_name_NSValue", referenced from:
      pointer-to-literal-objc-class-name in libRadioKit.a(AudioStreamEngine.o)
  ".objc_class_name_NSScanner", referenced from:
      pointer-to-literal-objc-class-name in libRadioKit.a(AudioStreamEngine.o)
  ".objc_class_name_NSCharacterSet", referenced from:
      pointer-to-literal-objc-class-name in libRadioKit.a(AudioStreamEngine.o)
  ".objc_class_name_NSAutoreleasePool", referenced from:
      pointer-to-literal-objc-class-name in libRadioKit.a(AudioStreamEngine.o)
      pointer-to-literal-objc-class-name in libRadioKit.a(XMLMetaParser.o)
      pointer-to-literal-objc-class-name in libRadioKit.a(reachability.o)
  ".objc_class_name_NSFileManager", referenced from:
      pointer-to-literal-objc-class-name in libRadioKit.a(AudioStreamEngine.o)
  ".objc_class_name_NSURLConnection", referenced from:
      pointer-to-literal-objc-class-name in libRadioKit.a(AudioStreamEngine.o)
      pointer-to-literal-objc-class-name in libRadioKit.a(XMLMetaParser.o)
  ".objc_class_name_NSThread", referenced from:
      pointer-to-literal-objc-class-name in libRadioKit.a(AudioStreamEngine.o)
  .....(etc)
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status

PS: I checked frameworks and all of them exist.

Answer 1

A bit late to the party but might be valuable to someone with this error..

I just straight copied a bunch of files into an Xcode project, if you forget to add them to your projects Build Phases you will get the error "Undefined symbols for architecture i386". So add your implementation files to Compile Sources, and Xib files to Copy Bundle Resources.

The error was telling me that there was no link to my classes simply because they weren't included in the Compile Sources, quite obvious really but may save someone a headache.