Default emacs installation on debian/wheezy, just open your file in emacs and hit M-x flymake-mode.

This mode has only two useful functions which you may want to assign to some keys like 

(global-set-key [f5] 'flymake-goto-next-error)
(global-set-key [f6] 'flymake-display-err-menu-for-current-line)

[download]
...in your .emacs.d/init.el file.

For even more fun run M-x cperl-mode and read it's docs with C-h m.

In reply to Re: On the fly syntax checkers in emacs, ultraedit or vi by fisher
in thread On the fly syntax checkers in emacs, ultraedit or vi by ISAI student

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.