linux-kernel - Re: What about make mergeconfig ?

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Message-ID: <Pine.LNX.4.62.0610271311260.23917@pademelon.sonytel.be>
Date:	Fri, 27 Oct 2006 13:14:46 +0200 (CEST)
From:	Geert Uytterhoeven <geert@...ux-m68k.org>
To:	Jan Engelhardt <jengelh@...ux01.gwdg.de>
cc:	Dick Streefland <dick.streefland@...ium.nl>,
	Linux Kernel Development <linux-kernel@...r.kernel.org>,
	sam@...nborg.org
Subject: Re: What about make mergeconfig ?

On Fri, 27 Oct 2006, Jan Engelhardt wrote:
> >> >What about RCS merge?
> >> 
> >> I take it we do not want to depend on too many tools (remember the 
> >> kconfig implementation language debate).
> >
> >If you have CVS installed, you have RCS merge.
> 
> 11:54 ichi:~ > rpm -q cvs rcs
> cvs-1.12.12-19
> package rcs is not installed
> 
> 11:54 ichi:~ > gzip -cd /ARCHIVES.gz | grep "/merge$"
> ./CD1/suse/i586/rcs-5.7-879.i586.rpm:
>     -rwxr-xr-x    1 root    root 45252 May  2 09:42 /usr/bin/merge
> 
> CVS does not need RCS.

OK, so CVS assimilated RCS merge internally.

> >>>merge -p other.config .config.old .config > other.config.new
> >> 
> >> This also does not seem conflict-safe.
> >
> >Indeed, you can still have conflicts, which you have to resolve manually.
> >
> >But it depends on what you want to achieve: do you want to set each config
> >option in the destination config to max(config1.option, config2.option), or do
> >you want to apply the recent changes for one config (which may include
> >disabling options) to another config?
> 
> In my case, the latter.
> 
> >For the latter, merge should work fine.
> 
> Is merge a lot different from what `patch` is doing?

Yes, it does 3-way merges (merge `my' version with `your' version using a
common ancestor). I.e. it's better in resolving conflicts than patch.

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds
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