title: compiler warning: Double is not supported. Demoting to float
body: <p>I'm getting the following message:</p>
  
  <blockquote>
    <p>Double is not supported. Demoting to float</p>
  </blockquote>
  
  <p>I added the following command to the compiler : <code>-arch=sm_20</code> but im still getting that message.<br>
  im using sdk 4 with Nvida G105M.</p>
  
  <p>What does this message mean?</p>