title: Completely exclude certain directories from Eclipse CDT project
body: <p>I am working a C++ codebase that is built &amp; run outside Eclipse.</p>
  
  <p>I made an Eclipse project out of it where I just use Eclipse for browsing/editing the code.</p>
  
  <p>However, I can't figure out how to <em>completely</em> exclude certain directories like build/ from it completely. They should be excluded not only during building but also during "Refresh workspace" which seems to get triggered so often. To give an example, my workspace is</p>
  
  <pre><code>d:\workspace
  </code></pre>
  
  <p>It has directories like</p>
  
  <pre><code>source/
  build/
  ..
  </code></pre>
  
  <p>During startup, Eclipse picks up all directories inside the workspace automatically. However, I would like Eclipse to exclude <code>build/</code> completely.</p>
  
  <p>My code is on a remote machine, so "Refresh workspace" slows things down.</p>