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    SubjectRe: [PATCH v3.1] kbuild: implement several W= levels
    On Tue, Apr 26, 2011 at 09:52:35PM +0200, Michal Marek wrote:
    > On 22.4.2011 19:50, Borislav Petkov wrote:
    > > From: Sam Ravnborg <sam@ravnborg.org>
    > >
    > > Building a kernel with "make W=1" produce far too much noise
    > > to be usefull.
    > >
    > > Divide the warning options in three groups:
    > >
    > > W=1 - warnings that may be relevant and does not occur too often
    > > W=2 - warnings that occur quite often but may still be relevant
    > > W=3 - the more obscure warnings, can most likely be ignored
    > >
    > > When building init/ on my box the levels produces:
    > >
    > > W=1 - 46 warnings
    > > W=2 - 863 warnings
    > > W=3 - 6496 warnings
    >
    > I guess these numbers are not valid after your changes? Not that the
    > exact numbers are important, but maybe the distribution change?

    I think so too that those numbers don't mean a lot. Instead, this
    feature makes more sense IMHO if you use it on a single file:

    make W=1 <file.c> 2>before.log

    <make your changes>

    make W=1 <file.c> 2>after.log

    diff -uprN before.log after.log

    and you let the compiler tell you which warnings you've introduced. Then
    you do the same game with W=2 and W=3.

    Nice, huh. :)

    --
    Regards/Gruss,
    Boris.


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