title: after updating xcode 6.4 to xcode 7 getting this issue
body: <p>I am getting this issue after updating xcode 6.4 to 7.0. </p>
  
  <p>I am using <code>Objective C</code></p>
  
  <pre><code> ld: embedded dylibs/frameworks are only supported on iOS 8.0 and later (@rpath/AFNetworking.framework/AFNetworking) for architecture arm64
          clang: error: linker command failed with exit code 1 (use -v to see invocation)
  </code></pre>
  
  <p>How to fix this ?</p>
  
  <p>I tried to add <code>Prefix Header</code> but i was unable to get <code>LLVM 6.0</code>  there i am getting LLVM 7.0”</p>