Re: [gentoo-dev] [LAST CHANCE]: kernel + kernel module ebuild changes

[Peter Johanson]

On Thu, Mar 18, 2004 at 01:56:40PM +0900, Georgi Georgiev wrote:
> maillog: 17/03/2004-19:51:12(-0500): Peter Johanson types
> > Yeah, It hadn't occured to me to try to incorporate more than one
> > EXTRAVERSION compile with this system. Doing things like this would get
> > really complicated/messy, but this might be mitigated by making:
> > KBUILD_OUTPUT= $KBUILD_OUTPUT_PREFIX/$MAJOR.$MINOR.$PATCHLEVEL$EXTRAVERSION
> > So that this happens automagically. whenever you change EXTRAVERSION in
> > the toplevel makefile. Only problem with that is the destination
> > directory isn't guaranteed to exist if you do this. config-kernel could
> > be extended to add a --set-extraversion foo which could handle all those
> > particulars though. WOuld this be sufficient?
>
> If you had in mind that whenever I do
>
> # config-kernel --set-extraversion /usr/src/linux-build/2.6.4-x2
>
> I would get
>
> # head -5 /usr/src/linux/Makefile
> VERSION = 2
> PATCHLEVEL = 6
> SUBLEVEL = 4
> EXTRAVERSION = -x2
> KBUILD_OUTPUT=$(KBUILD_OUTPUT_PREFIX)/$(MAJOR).$(MINOR).$(PATCHLEVEL)$(EXTRAVERSION)
>
> then I can live with that. I even dare say it would be perfect. Plus, the
> output directory would be created by config-kernel, so there is no worry about
> it not existing.
>

Yes, the above is pretty much what i was proposing. Here's how i have it
implemented (i'm actually 80% done with the code, gotta tidy up a bit
and add the directory creation bits)

# config-kernel --set-extraversion -pj1

which would only change the EXTRAVERSION value in
/usr/src/linux/Makefile to whatever was chosen. So after this you would
have

MAJOR = 2
PATCHLEVEL = 6
SUBLEVEL = 4
EXTRAVERSION = -pj1

That's if we don't have any KBUILD_OUTPUT set at all. If that's the case
then we're done here. If someone has configured themselves to use
koutput, then either kernel-2.eclass or config-kernel --make-koutput
will have made our original makefile look something like this (i think
referencing the above vars in the KBUILD_OUTPUT line is key to this
working):

MAJOR = 2
PATCHLEVEL = 6
SUBLEVEL = 4
EXTRAVERSION = -mm1
KBUILD_OUTPUT=/var/tmp/kernel-output/$(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION)

It's not really feasible (or really desirable) to have the prefix part
dependant on the environment once it is set for a particular instance of
a kernel, IMHO. Once it's set for one kernel, we don't want this
kernel's setup changing under our feet if we are doing things elsewhere.
When running --set-extraversion with this setup, the exact same change
happens as above, but since we have KBUIOD_OUTPUT set, we also make the
new directory for the new EXTRAVERSION.

This way you can seemlessly change the EXTRAVERSION and have a new
output location, etc.


> Or did you mean something like
>
> # config-kernel /usr/src/linux-build/
>
> to set the prefix, probably only once, and later
>
> # config-kernel --set-extraversion -x2
>
> to set EXTRAVERSION in /usr/src/linux/Makefile every time I switch kernels? The
> output directory can still be created by config-kernel at the second step and
> users would need to be advized to always use config-kernel and not change
> EXTRAVERSION manually. This is not such a big problem though.
>
> --
> \    Georgi Georgiev   \  "Never give in. Never give in. Never. Never. \
> /     chutz@×××.net    /  Never." -- Winston Churchill                 /
> \   [phone]   \                                               \



-- 
Peter Johanson
<latexer@g.o>

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