title: storage size of isn’t known using sigaltstack struct
body: <p>I'm using the sigalstack struct, details at:</p>
  
  <p><a href="https://developer.apple.com/library/mac/#documentation/Darwin/Reference/ManPages/man2/sigaltstack.2.html" rel="nofollow noreferrer">Here (MAC OSX)</a></p>
  
  <p><a href="http://man7.org/linux/man-pages/man2/sigaltstack.2.html" rel="nofollow noreferrer">HERE (LINUX)</a></p>
  
  <p>I'm just declaring it like so </p>
  
  <pre><code>struct sigaltstack aa;
  </code></pre>
  
  <p>and i keep getting the following error </p>
  
  <pre><code>error: storage size of ‘aa’ isn’t known
  </code></pre>
  
  <p>I read and checked <a href="https://stackoverflow.com/questions/4045550/storage-size-of-names-isnt-known">storage size of ‘names’ isn’t known</a> but I'm just declaring it, so it doesn't really apply. </p>