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    <p>Reading through perldoc perlrun it looks like you are looking for what is talked about in the -f option: </p> <blockquote> <p>-f</p> <p>Disable executing $Config{sitelib}/sitecustomize.pl at startup.</p> <p>Perl can be built so that it by default will try to execute $Config{sitelib}/sitecustomize.pl at startup (in a BEGIN block). This is a hook that allows the sysadmin to customize how Perl behaves. It can for instance be used to add entries to the @INC array to make Perl find modules in non-standard locations.</p> <p>Perl actually inserts the following code:</p> <pre><code>BEGIN { do { local $!; -f "$Config{sitelib}/sitecustomize.pl"; } &amp;&amp; do "$Config{sitelib}/sitecustomize.pl"; } </code></pre> <p>Since it is an actual do (not a require), sitecustomize.pl doesn't need to return a true value. The code is run in package main , in its own lexical scope. However, if the script dies, $@ will not be set.</p> <p>The value of $Config{sitelib} is also determined in C code and not read from Config.pm , which is not loaded.</p> <p>The code is executed very early. For example, any changes made to @INC will show up in the output of <code>perl -V</code>. Of course, END blocks will be likewise executed very late.</p> <p>To determine at runtime if this capability has been compiled in your perl, you can check the value of $Config{usesitecustomize} .</p> </blockquote> <p>I've never done this, but it looks like if you put what you want in <code>$Config{sitelib}/sitecustomize.pl</code> you'll get what you are looking for.</p> <p>See:</p> <ul> <li><a href="http://perldoc.perl.org/perlrun.html" rel="noreferrer">http://perldoc.perl.org/perlrun.html</a></li> <li><a href="http://www.nntp.perl.org/group/perl.perl5.porters/2007/10/msg129926.html" rel="noreferrer">http://www.nntp.perl.org/group/perl.perl5.porters/2007/10/msg129926.html</a></li> </ul>
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    1. COThanks - that's what I was looking for!
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    2. COWhere can I read on the %Config hash? Googling `perl Config hash` gets too much stuff...
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    3. CO@Dallaylaen Take a look at http://perldoc.perl.org/Config.html
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