title: How do you a preprocess statement for #include
body: <p>The following seems to do nothing and I'm not sure why. I have the following lines at the top of my code with SOME_FUNCTION also defined of course. Can you do something like this for another directive of include?</p>
  
  <pre><code>#if SOME_FUNCTION(4,3,0)
  #include "myfile.hh"
  #else
  #endif
  </code></pre>