Undefined symbols for architecture i386:
"_OBJC_CLASS_$_PDFDoc", referenced from:
objc-class-ref in RootViewController.o
"_OBJC_CLASS_$_PanTool", referenced from:
objc-class-ref in RootViewController.o
"_OBJC_CLASS_$_PDFViewCtrl", referenced from:
objc-class-ref in RootViewController.o
(maybe you meant: _OBJC_CLASS_$_PDFViewCtrlAppDelegate)
"_OBJC_CLASS_$_Print", referenced from:
objc-class-ref in RootViewController.o
"_OBJC_CLASS_$_PDFNet", referenced from:
objc-class-ref in RootViewController.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)