title: Reference code in a separate project in XCode 4.2
body: <p>I'm working on an iOS app where I use third party libraries. I want to migrate my project to use ARC, but the third party libraries are still using the old memory management. So I want to separate third party code and put it in a separate project without ARC, and then somehow link that project into my iOS-app project, so that they will be built together using the same configuration.</p>
  
  <p>Is this possible to do in a very simple way, or am i better of just turning off ARC for the individual files? (seems very tedious..)</p>
  
  <p>Can I use a workspace? Where one project is my iOS app and the other just contains third party code?</p>
  
  <p>I've played around a bit and googled a lot, but there just doesn't seem to be any simple soultion, or am I wrong? </p>