title: linker command failed with exit code 1 (use -v to see invocation) in Swift
body: <p>I used Swift language in my IOS application project in Xcode6 Beta6 and then I had to work on it with another computer. Then I got this error:</p>
  
  <blockquote>
    <p>"clang: error: linker command failed with exit code 1 (use -v to see invocation)" </p>
  </blockquote>
  
  <p>This error is shown only different computers than the computer on which I opened my project at first. It does not give an error in the first computer (which I opened and started to the project)</p>
  
  <p>I tried to clean, and delete the contents of DerivedData folder, but it gives me the same error again. Below this error, it also says that "file not found:" for inside of the DerivedData folder:</p>
  
  <blockquote>
    <p>file not found: /Users/macbook/Library/Developer/Xcode/DerivedData/SihirliSayilar-gmmsqkhqgygosqeuqdiibnrjasbq/Build/Products/Debug-iphonesimulator/Project.app/Project</p>
  </blockquote>
  
  <p>I looked the other titles for this issue, but none of them solve this problem. 
  Thank you for any help!</p>