turn warning into error?

[Gabriel Zachmann]

Can I somehow turn the following warning:

    "warning: passing NULL used for non-pointer argument passing ..."

into an error?
I consider this a serious bug, and sometimes, it can be hard to spot the
critical warnings among many others.

(I did check the gcc info pages, and the newsgroups)

Thanks a lot in advance,
Gabriel.

-- 
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| Sigh no more, ladies, sigh no more, \ Men were deceivers ever;          |
| One foot in sea and one on shore;   \ To one thing constant never.      |
| Then sigh not so, \ But let them go,                                    |
| And be you blithe and bonny; \ Converting all your sounds of woe        |
| Into Hey nonny, nonny.            (Shakespeare, Much Ado About Nothing) |
| zach@cs.uni-bonn.de            __@/'        www.gabrielzachmann.org     |
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