title: How to enable the "basic" device in pocl?
body: <p>I have  installed <a href="http://portablecl.org/" rel="nofollow noreferrer">pocl</a>. 
  <code>make check</code> shows all 145 tests passed.
  The build shows that </p>
  
  <pre><code>--******** Enabled features:
  ......
  
  -- OCL_DRIVERS (Drivers built): basic pthreads
  ......
  </code></pre>
  
  <p>But <code>clinfo</code> command shows only <code>pthreads</code> as the only device for the pocl platform. Is there a way to enable the <code>basic</code> device?
  I want to add a custom opencl device to pocl. Understanding <code>basic</code> device implementation in pocl seems to be a good starting point.</p>