Re: [PATCH v3.1] kbuild: implement several W= levels

Sam Ravnborg
2011-04-27T08:25:56Z

On Fri, Apr 22, 2011 at 07:50:42PM +0200, 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
>
> Many warnings occur from .h files so fixing one file may have a nice
> effect on the total number of warnings.
>
> With these changes I am actually tempted to try W=1 now and then.
> Previously there were just too much noise.
>
> Borislav:
>
> - make the W= levels exclusive
I do not see the point in this really. This is not what most people would
expect.
When you ask for more you get more - not something else.

We see it with verbose levels where -vv give more output than -v etc.

Anyway - the important thing is to keep the relevant warnings at W=1 level.
Which is independendt of this change.
So consider the input and decide - I do not want to make a fuzz about it.

Sam