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SubjectRe: State of the new config & build system
On Fri, Dec 28, 2001 at 12:41:48PM +1100, Keith Owens wrote:
> On Thu, 27 Dec 2001 17:37:39 -0800,
> Larry McVoy <> wrote:
> >A couple of questions:
> >
> >a) will 2.5 be as fast as the current system? Faster?
> At the moment kbuild 2.5 ranges from 10% faster on small builds to 100%
> slower on a full kernel build.

I don't understand why it would be slower. Maybe I'm clueless but I thought
you were moving more towards a single makefile system, kind of like what
BSD had about 15 years ago, you went to /sys/MYMACHINE and typed make and
it did the build completely in that directory. You did different configs
by running a configure tool that made /sys/MYMACHINE /sys/YOURMACHINE, etc.

If this is the general approach, shouldn't this be a lot faster than the
current approach? The current approach stats stuff many times. Linux is
really good at making stats cheap, but nothing is as good as not doing it

Am I completely misunderstanding what kbuild is all about? My apologies
if so...
Larry McVoy lm at
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