title: No symbols/source for external library in Xcode 4
body: <p>My application is not seeing source code for a library:</p>
  
  <ul>
  <li>If I "Jump to definition" on a library method, XCode takes me to the .h file but says there is no .cpp counterpart</li>
  <li>When debugging, I see no source code and most of the call-stack is missing for the library:
  <img src="https://i.stack.imgur.com/ETKZd.png" alt="enter image description here"></li>
  <li>I have made sure "Show disassembly when debugging" is UNchecked</li>
  </ul>
  
  <p>I built the library as DEBUG and then packaged up the headers+.a file into a SDK dir. So I guess I need to either copy the debug files into that SDK dir as well, or tell my application where to look. I'm not sure how to do either.</p>
  
  <p>To clarify, my application project doesn't maintain a reference to the library project, only to the .a files and the header dirs. This is because the library project is created by CMake and I don't want to modify it.</p>