title: Precise mode in Boehm Garbage Collector
body: <p>I've read on the webpage of Mono that they are using the Boehm GC in precise mode. I too use the Boehm GC with C++, however, I have found nothing in its documentation or headers that would indicate a precise mode, much less how to turn it on.</p>
  
  <p>Any information whether it actually has a precise mode by default and how to turn it on, or it was just some kind of modification by Mono developers?</p>