title: Can someone explain the meaning of this 'typedef'?
body: <p>Can someone explain this typedef please?</p>
  
  <pre><code>typedef void (*_sig_func_ptr)(int);
  </code></pre>
  
  <p>Understanding its meaning seems critical to answering my question:
  <a href="https://stackoverflow.com/questions/14915812/mpich2-compilation-issue-using-cygwin#comment20932150_14915812">MPICH2 compilation issue using Cygwin</a></p>