title: Xcode: suppressing specific warning
body: <p>To disable compiler warning I go to <strong>Project</strong> -> <strong>Target</strong> -> <strong>Build Settings</strong> and add flag </p>
  
  <pre><code>-w
  </code></pre>
  
  <p>for specific file. This flag disables <strong>all</strong> warnings.</p>
  
  <p>But my intention is to exclude a specific warning, not all.
  I found a solution like this:</p>
  
  <pre><code>-Wnodeprecated-declarations
  </code></pre>
  
  <p>where <strong>deprecated-declarations</strong> is a specific warning <em>id</em>.</p>
  
  <p>How can I determine which <em>id</em> has a specific warning? (In my Xcode only warning description is displayed)</p>