title: Implicit declaration of function - C99
body: <p>I am currently using Xcode 4, and in my .pch file I have this macro:
  <code>#define localize(s) NSLocalizedString((s), nil)</code>.<br>
  When I try to use this macro in some .m file, I receive this warning: <code>Implicit declaration of function 'localize' is invalid in C99</code>.  </p>
  
  <p>This code compiles without a problem, but how can I fix this so I don't get a warning?</p>