Undefined symbols for architecture x86_64:
"_NSDefaultRunLoopMode", referenced from:
_uiMainStep in main.m.o
"_OBJC_CLASS_$_NSDate", referenced from:
objc-class-ref in main.m.o
"_OBJC_CLASS_$_NSDictionary", referenced from:
objc-class-ref in multilineentry.m.o
"_OBJC_CLASS_$_NSMutableArray", referenced from:
objc-class-ref in alloc.m.o
objc-class-ref in box.m.o
objc-class-ref in menu.m.o
objc-class-ref in radiobuttons.m.o
objc-class-ref in tab.m.o
ld: symbol(s) not found for architecture x86_64
0b45d5b8f9