title: SDLMain.h for Xcode
body: <p>Does any one know what CPS is as mentioned in SDLMain.h</p>
  
  <pre><code>23 /* Use this flag to determine whether we use CPS (docking) or not */
  24 #define SDL_USE_CPS   1
  25 #ifdef SDL_USE_CPS
  </code></pre>
  
  <p>I can't seem to find it searching the docs</p>