title: VCS incremental elaboration feature
body: <p>Does anyone knows this feature? I came across this term, and not sure this is not the same as  incremental compilation (below)</p>
  
  <pre><blockquote>....
  4 modules and 0 UDP read.
          However, due to incremental compilation, only 1 module needs to be compiled.
  ....</blockquote></pre>
  
  <p>If this is not it, are there any special switches for that, or does that work automatically?</p>