title: Disable specific warning in g++ using warning number
body: <p>I would like to suppress the warning #858 in g++:</p>
  
  <pre><code>warning #858: type qualifier on return type is meaningless
  </code></pre>
  
  <p>and possibly others. I know I've done this before (although <a href="https://stackoverflow.com/questions/487108/how-to-supress-specific-warnings-in-g">this topic</a> seems to say you can't), but don't remember how. </p>
  
  <p>I've been trying to look for this warning in <a href="https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html" rel="nofollow noreferrer">this list</a> to see if I could disable it using <code>-Wno...</code>, but none of them seem to fit.</p>