Starting with Xcode 4.5 the possibility of building for armv6 devices is not given anymore (iPhone/iPod touch 1st and 2nd generation). This means no new versions of our app for
There's another solution I found in chpwn blog: Building for armv6 in Xcode 4.5.
This allows you to work with Xcode 4.5 but compile using 5.1 SDK.
The downside: you can’t use the iOS 6 SDK when using this trick, and you can’t build for armv7s.