title: iOS,CoreAudio: a strange 'CADebugPrintf.h: no such file or directory ... ' error
body: <p>There are bunch of helper filess in 'iPublicUtility' folder of several audio related Apple sample codes, such as aurioTouch:
  <a href="http://developer.apple.com/library/ios/#samplecode/aurioTouch/Introduction/Intro.html" rel="noreferrer">http://developer.apple.com/library/ios/#samplecode/aurioTouch/Introduction/Intro.html</a></p>
  
  <p>I can build these samples fine.  But whenever I create a new project for testing and include the files from 'iPublicUtility' folder, I get:
  'CADebugPrintf.h: no such file or directory ... ' error in 'CADebugMacros.h' file.</p>
  
  <p>I made the settings of my test project to coincide with Apple samples, but this error is
  not going away.  Any suggestion?</p>
  
  <p>SDK: iOS 4.2, 
  iMac OSX 10.6.6</p>
  
  <p>Thanks all.</p>
  
  <p>sy</p>