title: iOS code coverage broken in Xcode 4.5?
body: <p>I'm trying to set up code coverage in Xcode 4.5. To do so, I turned on Generate Test Coverage Files and Instrument Program Flow for debug setting. According to <a href="http://meandmark.com/blog/2012/08/xcode-4-generating-code-coverage-files-with-llvm/" rel="noreferrer">http://meandmark.com/blog/2012/08/xcode-4-generating-code-coverage-files-with-llvm/</a> that's all you need. However, now the linker complains that it can't find:</p>
  
  <ul>
  <li>_llvm_gcda_emit_arcs</li>
  <li>_llvm_gcda_emit_function</li>
  <li>_llvm_gcda_end_file</li>
  <li>_llvm_gcda_increment_indirect_counter</li>
  <li>_llvm_gcda_start_file</li>
  </ul>
  
  <p>I tried to find libprofile_rt.dylib, but it doesn't seem to exist anymore. What else is needed to generate code coverage files?</p>