lkml.org 
[lkml]   [2001]   [Dec]   [29]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: State of the new config & build system
Legacy Fishtank wrote:
>
> On Sat, Dec 29, 2001 at 03:44:10PM +1100, Keith Owens wrote:
> > What Mr. Fishtank seems to overlook is that kbuild 2.5 is far more
> > flexible and accurate than 2.4, including features that lots of people
> > want, like separate source and object trees.
>
> I don't see the masses, or, well, anybody on lkml, clamoring for this.

Clamour.

The current system has some significant problems. Pet peeves:

- Failure to rebuild the right things after you've applied a patch
- Doesn't work when the same tree is accessed via different paths
(make dep on local machine, build across nfs)
- Mysterious recompilation of things which you've already compiled.

> IIRC from the kernel summit SGI was the only entity clamoring for this.
>
> > Now that the overall
> > kbuild design is correct, the core code can be rewritten for speed.
> > And that will be done a couple of weeks after kbuild 2.5 goes into the
> > kernel, then I expect kbuild 2.5 to be faster than kbuild 2.4 even on
> > full builds.
>
> Ok... you want kbuild into 2.5 ASAP, only to submit a rewrite two weeks later?

An optimisation of one bit, Keith says. I'd guess that his two-week
estimate is optimistic because he'll have a busy two weeks supporting
the patch once it goes in, but whatever.

> If so it makes even less sense to get kbuild into 2.5.x now.

Keith says it speeds up builds where only a small number of files
have changed. For me, that's the common case.

I'd like to hear more from Keith on where this 100% actually occurs,
but if he says it's fixable in a (give him four) week timeframe,
I believe him.

As you know, I'd be more concerned about moves to drop support
for the older and much faster gcc versions. If you're not using
egcs-1.1.2, you're already a very patient person.

> Jeff

Fish.

-
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:14    [from the cache]
©2003-2011 Jasper Spaans