Unfortunately, I guess I can't use it on my next project anyway, since I need to support iOS5.1 which probably means XCode… 4? Sigh…
Can't you use Xcode 6 and set the minimum deploy target to iOS 5.1? If that's not possible it should be possible to use Xcode 4 and replace the Clang compiler that Xcode uses with a later version.
-- /Jacob Carlborg