Upgraded to IOS5 - App Won't Build

Question

I've upgraded my IOS4.3 app to IOS5 and am getting compile errors. From what I can tell, the syntax looks fine, but the compiler is complaining of "Unexpected @" when I synthesize properties, but only in some classes.

I also have an "Undeclared identifier" in one ViewController's viewDidLoad method.

I've performed a clean build and I'm guessing that there's a default setting which has been changed somewhere, but from scouring around this doesn't seem to be a common issue. Is there a list of common breaking changes anywhere?

EDIT: This screenshot is one of my ViewControllers, which is derived from UITableViewController

Answer 1

There is a missing @ in the line self.title = NSLocalizedString(...) . The second parameter doesn't have the leading @.

Answer 2

Coming from a .NET/PHP background, I have very little experience with compilers. The problem was that Apple seem to have changes the default compiler for IOS5 from GCC to LLVM, hence the difference in syntax. It would be nice to be able to use the newer compiler, but GCC's the only one which gets anywhere near close.