you could also use an init sub, where you require the modules you need, and set some variables to the different subs...

note: I have not tested this code, and I haven't done any cross-platform scripting that requires something like this, I just remembered seeing this technique in Perl For System Administration by David N. Blank-Edelman (ORA). 

sub Init {
    use Common::Module;
    my ($common_var01, $common_var02) = ($foo, $bar);

    if ($^0 eq "MSWin32") {
        require Win32::Baz;
        require Win32::Quux;

        common_sub01 = "common_sub01_nt";
        common_sub02 = "common_sub02_nt";
    }
    else {
        require Foo;

        common_sub01 = "common_sub01_unix";
        common_sub02 = "common_sub02_unix";
    }
}

sub common_sub01_nt {
    ...
}

sub common_sub01_unix {
    ...
}

# main program
# (where we call the subs)
&$common_sub01($foo, $bar) if $foobar;

[download]

hope it helps,

In reply to Re: Runtime module use and sub definitions by CukiMnstr
in thread Runtime module use and sub definitions by RhetTbull

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.