title: ld: symbol(s) not found for architecture x86_64 (Xcode 4) // opengles.o
body: <p>I'm making an xcode command tool application with external libraries and got some errors.</p>
  
  <p>what i tried to resovle them :</p>
  
  <ul>
  <li>Build with different compiler</li>
  <li>remove The GLES folder and add it again</li>
  <li>Build it on 32 and 64</li>
  </ul>
  
  <p>Am i missing something regarding the opengles.cpp ?</p>
  
  <p>If you got any idea what can be done next please say so, below you can find all the info regarding the project and error. If you need more info i'm happy to assist you. Also if you know how to get the NiUsertracker sample from opnni compiled in xcode 4, it would also be a great help to solve this problem</p>
  
  <p>The error :</p>
  
  <p><img src="https://i.stack.imgur.com/z2aqc.png" alt="enter image description here"></p>
  
  <p>The problem might have something to do with these files :</p>
  
  <p><img src="https://i.stack.imgur.com/uycvc.png" alt="enter image description here"></p>
  
  <p>The info of the project setting (it's a command line tool not an app) : </p>
  
  <p><img src="https://i.stack.imgur.com/cFvqW.png" alt="enter image description here"></p>
  
  <p>Screenshot of the output when building</p>
  
  <p><img src="https://i.stack.imgur.com/eROEd.png" alt="enter image description here"></p>
  
  <p>The build settings </p>
  
  <p><img src="https://i.stack.imgur.com/6XkvD.png" alt="enter image description here"></p>