title: Changing Compiler to llvm-clang on existing iPhone Project
body: <p>When I switch the Compiler Version to Clang llvm 1.0 in existing projects I get the following build error when Precompiling the *.pch file:</p>
  
  <pre><code>error: can't exec '/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/llvm-gcc-4.2' (No such file or directory)
  </code></pre>
  
  <p>Is there another setting I need to change to get my project to work with the new compiler? </p>
  
  <p>(I did try a clean all targets)</p>
  
  <hr>
  
  <p>Update:</p>
  
  <p>To clarify:</p>
  
  <p>Since the new compiler does in fact work with new projects, the issue is not that my system is missing anything.</p>
  
  <p>Additionally, Xcode should not even be trying to find llvm-gcc-4.2 as the whole point is that I switched from that compiler to the new one, Clang llvm 1.0. This is what has led me to believe there is still another setting to be changed.</p>
  
  <hr>
  
  <p>Thanks to fbereto for his suggestion. The actual answer lies in the comments.</p>