Bug#190757: please add a warning for conversion from "int" to "unsigned int"

[Daniel Jacobowitz <dan@debian.org>]

On Fri, Apr 25, 2003 at 08:40:11PM +0200, Robert Millan wrote:
> On Fri, Apr 25, 2003 at 02:18:18PM -0400, Daniel Jacobowitz wrote:
> > 
> > Is this roughly what you want:
> > drow@nevyn:~% gcc-3.2 -Wall -Wconversion -c c.c
> > c.c: In function `main':
> > c.c:8: warning: passing arg 1 of `a' as unsigned due to prototype
> > c.c:8: warning: negative integer implicitly converted to unsigned type
> 
> yes
> 
> > It's not part of -Wall because it's too noisy.
> 
> that disconcerts me, I thought -Wall would include all warnings. would
> you consider including it? it may be noisy but can be easily fixed
> with a cast, and the benefit is being safe from a quite common bug.

No, the decision was made after looking at the false positive rate.  I
recommend you read the manual if you want to know what GCC warnings do.
It's not quite as clear as it could be, but -Wall is in the middle of
the page, and says "all warnings above here".

-- 
Daniel Jacobowitz
MontaVista Software                         Debian GNU/Linux Developer