title: how to find out which perl I am using when running a script with '/usr/bin/env perl'?
body: <p>With a shebang like <code>#!/usr/bin/env perl</code> how can I make accessible to the script the perl I am using for running the script?<br>
  (Like in the <code>perl -E 'say $ENV{_}'</code> command line).</p>