Consider the following program: 

#!/usr/bin/perl -W
use Cwd;
print "You're in '", getcwd(), "'\n";

[download]

I just moved up to the latest Redhat distribution, and perl is now generating the following error when I run this program:

Subroutine Cwd::fastcwd redefined at /usr/lib/perl5/5.8.5/i386-linux-thread-multi/XSLoader.pm line 92.

What happened? This is a virgin Redhat distribution, so I wouldn't expect this kind of error out of the box. Where's the problem? In Cwd? Or in XSLoader.pm?

Perl never used to generate this error. And, as you might expect, if I change -W to -w, the error goes away. How can I continue to use -W in my script and still keep perl quiet about this redefined routine. It does NOT go away if I merely precede the "use Cwd" with "no warnings 'redefine'" (though it seems it should). So, the question is, where is the real error, and what should I be doing?

PS: I did a Google search on this error message, and everyone else that's reported the same error seems to be on a windows box, and it was deemed the version of perl they were using was the culprit.

Dan Heller
http://www.danheller.com

In reply to perl reports fastcwd 'redefined' when using Cwd and -W by argv

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.