title: warning: -Wuninitialized is not supported without -O
body: <p>The compiler complains about this, after I activated all kind of warnings:</p>
  
  <p>For MyApp_Prefix.pch the compiler says:</p>
  
  <blockquote>
    <p>warning: -Wuninitialized is not
    supported without -O</p>
  </blockquote>
  
  <p>What does that mean?</p>