title: Excluding folders from dependencies autogenerated by eclipse?
body: <p>I'm new to eclipse and haven't been able to solve this problem after 40 minutes of searching.</p>
  
  <p>I have a c++ project in the latest version of eclipse.  My project uses boost.</p>
  
  <p>Eclipse generates a makefile for me with a bunch of .d files that list the dependencies.  A long list of boost headers are included in the .d files.</p>
  
  <p>When I run make, it scans every single one of the boost headers to see if they have changed.  This makes the build speed unbearably slow.</p>
  
  <p>How can I prevent anything in the boost folder from being added to the .d files?</p>
  
  <p>Thanks much.</p>