You can do whatever the hell you want with code copyrighted by you. If you do not own the copyright on all of the code you use (such as the inclusion of GPL'ed code within your own code), then you are subject to the lowest-common-denominator of licenses of the copyrighted works you are using.

Simply using other Perl modules doesn't count. You may be bundling them with your own code, but your product is not composed of a derivative of their code, you are simply re-distributing their code without modification. Even if you do modify their code, by distributing it you are simply releasing your modifications under their license (the GPL). This in no way "infects" your application.

Generally the code is yours to do with as you please, unless you have cut/pasted code written by somebody else into your own application, at which point (assuming it's GPL'ed), it's illegal for you to re-distribute the result without GPL'ing it in turn.

In reply to Re: ethical software development by Fastolfe
in thread ethical software development by dshahin

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.