title: Library not found for -lOAuthConsumer_iPhone
body: <p>I have an iphone app to upload to the AppStore and I am stuck with Xcode. </p>
  
  <p>It keeps telling me when I want to create a build:</p>
  
  <p>Library not found for -lOAuthConsumer_iPhone</p>
  
  <p>I have checked everywhere on the web and haven't really found what the problem is. 
  Please bear in mind that I am not an iphone developer. I just know how to submit the apps but this bug here is really annoying as I can't find what it is.</p>
  
  <p>Where can I find that library and how can I install it? 
  And where to install it??</p>