Undefined symbols for architecture i386 while i m running?
<p>Undefined symbols for architecture i386:
  "_OBJC_CLASS_$_MFDocumentManager", referenced from:
      objc-class-ref in SearchTextInPdfViewController.o
      objc-class-ref in BasicLauncherController.o
  "_OBJC_METACLASS_$_MFDocumentViewController", referenced from:
      _OBJC_METACLASS_$_DocumentViewController in DocumentViewController.o
  "_OBJC_CLASS_$_MFDocumentViewController", referenced from:
      _OBJC_CLASS_$_DocumentViewController in DocumentViewController.o
  "_initProfile", referenced from:
      -[SearchManager startSearchOperationForSearchTerm:andPage:] in SearchManager.o
ld: symbol(s) not found for architecture i386
collect2: ld returned 1 exit status</p>
