You don't have to convince him; you just have to get him to change his behavior. Isn't there a quality rating system for CPAN modules? I don't know how thorough or how effective it is, but if "build warnings" are considered unacceptable, that may get his attention.
Well, it is possible to write a review against a module and rate it. However, I have seen that venue become a vehicle for retaliatory activities.

Then there is CPANTS. However, they don't build modules, leaving that activity to CPAN testers.

As to CPAN testers, there is no criteria related to build warnings - just 'make test' results.

So AFAIK, there is no feedback mechanism for build warnings other than reporting them to the developer (as I did, along with a patch) with RT being the most effective method for that purpose.

Remember: There's always one more bug.

In reply to Re^2: Ignoring warnings by jdhedden
in thread Ignoring warnings by jdhedden

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.