title: Linker can't find _objc_msgSend and many other symbols
body: <p>So , i have two problems with Xcode . I'm new in the iPhone app development so that any help would be useful . I'm creating an app with a mapView , so first i did everything as it should be . Declaration , view did load , delegates and so on . After that i connected it the property to the map view , and it turned out 28 errors..On the simulator it works , including the map , but on the phone it always breaks . And after that i deleted all the code that's for the map view, it stayed the same . </p>
  
  <p>Some ideas what could this be ? how to make a map view for iPhone ?</p>
  
  <pre><code>"_OBJC_CLASS_$_NSBundle", referenced from:
        objc-class-ref in AppDelegate.o
    "_OBJC_CLASS_$_NSFileManager", referenced from:
        objc-class-ref in AppDelegate.o
    "_objc_msgSendSuper2", referenced from:
        -[AppDelegate dealloc] in AppDelegate.o
        -[MainViewController didReceiveMemoryWarning] in MainViewController.o
        -[MainViewController viewDidLoad] in MainViewController.o
        -[MainViewController viewDidUnload] in MainViewController.o
        -[MainViewController viewWillAppear:] in MainViewController.o
        -[MainViewController viewDidAppear:] in MainViewController.o
        -[MainViewController viewWillDisappear:] in MainViewController.o
        ...
    "_objc_setProperty", referenced from:
        -[AppDelegate setWindow:] in AppDelegate.o
        -[MainViewController setManagedObjectContext:] in MainViewController.o
        -[MainViewController setOdaberiTaxi:] in MainViewController.o
        -[MainViewController setIzbornik:] in MainViewController.o
        -[MainViewController setTaxiPicker:] in MainViewController.o
        -[MainViewController setListaTaxiZG:] in MainViewController.o
        -[MainViewController setToolbar:] in MainViewController.o
        ...
    "__objc_empty_vtable", referenced from:
        _OBJC_CLASS_$_AppDelegate in AppDelegate.o
        _OBJC_METACLASS_$_AppDelegate in AppDelegate.o
        _OBJC_CLASS_$_MainViewController in MainViewController.o
        _OBJC_METACLASS_$_MainViewController in MainViewController.o
        _OBJC_CLASS_$_FlipsideViewController in FlipsideViewController.o
        _OBJC_METACLASS_$_FlipsideViewController in FlipsideViewController.o
    "_OBJC_CLASS_$_UIResponder", referenced from:
        _OBJC_CLASS_$_AppDelegate in AppDelegate.o
    "_objc_msgSend", referenced from:
        _main in main.o
        -[AppDelegate dealloc] in AppDelegate.o
        -[AppDelegate application:didFinishLaunchingWithOptions:] in AppDelegate.o
        -[AppDelegate applicationWillTerminate:] in AppDelegate.o
        -[AppDelegate saveContext] in AppDelegate.o
        -[AppDelegate managedObjectContext] in AppDelegate.o
        -[AppDelegate managedObjectModel] in AppDelegate.o
        ...
    "_OBJC_CLASS_$_UIActionSheet", referenced from:
        objc-class-ref in MainViewController.o
    "_OBJC_CLASS_$_UIViewController", referenced from:
        _OBJC_CLASS_$_MainViewController in MainViewController.o
        _OBJC_CLASS_$_FlipsideViewController in FlipsideViewController.o
    "_objc_autoreleasePoolPop", referenced from:
        _main in main.o
    "__objc_empty_cache", referenced from:
        _OBJC_CLASS_$_AppDelegate in AppDelegate.o
        _OBJC_METACLASS_$_AppDelegate in AppDelegate.o
        _OBJC_CLASS_$_MainViewController in MainViewController.o
        _OBJC_METACLASS_$_MainViewController in MainViewController.o
        _OBJC_CLASS_$_FlipsideViewController in FlipsideViewController.o
        _OBJC_METACLASS_$_FlipsideViewController in FlipsideViewController.o
    "_UIApplicationMain", referenced from:
        _main in main.o
    "_OBJC_METACLASS_$_UIResponder", referenced from:
        _OBJC_METACLASS_$_AppDelegate in AppDelegate.o
    "_OBJC_CLASS_$_UIView", referenced from:
        objc-class-ref in MainViewController.o
    "_OBJC_CLASS_$_UIApplication", referenced from:
        objc-class-ref in MainViewController.o
    "_OBJC_CLASS_$_NSArray", referenced from:
        objc-class-ref in MainViewController.o
    "_OBJC_CLASS_$_NSManagedObjectContext", referenced from:
        objc-class-ref in AppDelegate.o
    "___CFConstantStringClassReference", referenced from:
        CFString in AppDelegate.o
        CFString in AppDelegate.o
        CFString in AppDelegate.o
        CFString in AppDelegate.o
        CFString in MainViewController.o
        CFString in MainViewController.o
        CFString in MainViewController.o
        ...
    "_OBJC_CLASS_$_UIAlertView", referenced from:
        objc-class-ref in MainViewController.o
    "_OBJC_METACLASS_$_UIViewController", referenced from:
        _OBJC_METACLASS_$_MainViewController in MainViewController.o
        _OBJC_METACLASS_$_FlipsideViewController in FlipsideViewController.o
    "_NSSQLiteStoreType", referenced from:
        -[AppDelegate persistentStoreCoordinator] in AppDelegate.o
    "_objc_autoreleasePoolPush", referenced from:
        _main in main.o
    "_NSStringFromClass", referenced from:
        _main in main.o
    "_NSLog", referenced from:
        -[AppDelegate saveContext] in AppDelegate.o
        -[AppDelegate persistentStoreCoordinator] in AppDelegate.o
    "_OBJC_CLASS_$_NSManagedObjectModel", referenced from:
        objc-class-ref in AppDelegate.o
    "_OBJC_CLASS_$_NSURL", referenced from:
        objc-class-ref in MainViewController.o
    "_OBJC_METACLASS_$_NSObject", referenced from:
        _OBJC_METACLASS_$_AppDelegate in AppDelegate.o
        _OBJC_METACLASS_$_MainViewController in MainViewController.o
        _OBJC_METACLASS_$_FlipsideViewController in FlipsideViewController.o
    "_OBJC_CLASS_$_NSPersistentStoreCoordinator", referenced from:
        objc-class-ref in AppDelegate.o
  ld: symbol(s) not found for architecture armv7
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>