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* [gentoo-user] "auto-config" of new gentoo-sources?
@ 2013-02-22 18:52 Jarry
  2013-02-22 20:12 ` Mike Gilbert
  0 siblings, 1 reply; 4+ messages in thread
From: Jarry @ 2013-02-22 18:52 UTC (permalink / raw
  To: gentoo-user

Hi Gentoo-users,

I noticed one thing so I want to ask if it is a coincidence
or intentional behaviour. It concerns "installation" of kernel
sources (more exactly gentoo-sources).

When I installed Gentoo on new computer I followed oficial guide.
So I emerged gentoo-sources, went through "make menuconfig",
configured everything I needed, compiled kernel, installed, etc.

Now the funny thing: When I update sources (like now, 3.7.9)
and go through "make menuconfig" again (this time in new tree),
there is nearly nothing to do, except a few new features.
It looks like they are "pre-configured" exactly for me! :-)

So my question is: how is this possible? Is maybe ".config"
file from the old sources-tree copied to new sources-tree?
Or is the actual configuration of running kernel somehow
detected and ".config" file generated?

Just curious, because I think it was not always this way.

Jarry
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^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [gentoo-user] "auto-config" of new gentoo-sources?
  2013-02-22 18:52 [gentoo-user] "auto-config" of new gentoo-sources? Jarry
@ 2013-02-22 20:12 ` Mike Gilbert
  2013-03-09  9:09   ` Graham Murray
  0 siblings, 1 reply; 4+ messages in thread
From: Mike Gilbert @ 2013-02-22 20:12 UTC (permalink / raw
  To: gentoo-user

On Fri, Feb 22, 2013 at 1:52 PM, Jarry <mr.jarry@gmail.com> wrote:
> So my question is: how is this possible? Is maybe ".config"
> file from the old sources-tree copied to new sources-tree?
> Or is the actual configuration of running kernel somehow
> detected and ".config" file generated?
>

The latter. Have a look at DEFCONFIG_LIST init/Kconfig.


^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [gentoo-user] "auto-config" of new gentoo-sources?
  2013-02-22 20:12 ` Mike Gilbert
@ 2013-03-09  9:09   ` Graham Murray
  2013-03-09  9:44     ` Nilesh Govindrajan
  0 siblings, 1 reply; 4+ messages in thread
From: Graham Murray @ 2013-03-09  9:09 UTC (permalink / raw
  To: gentoo-user

Mike Gilbert <floppym@gentoo.org> writes:

> On Fri, Feb 22, 2013 at 1:52 PM, Jarry <mr.jarry@gmail.com> wrote:
>> So my question is: how is this possible? Is maybe ".config"
>> file from the old sources-tree copied to new sources-tree?
>> Or is the actual configuration of running kernel somehow
>> detected and ".config" file generated?
>>
>
> The latter. Have a look at DEFCONFIG_LIST init/Kconfig.

So is it no longer necessary to run 'zcat /proc/config.gz > .config' to
transfer the current configuration as a 'seed' when installing a new
kernel?


^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [gentoo-user] "auto-config" of new gentoo-sources?
  2013-03-09  9:09   ` Graham Murray
@ 2013-03-09  9:44     ` Nilesh Govindrajan
  0 siblings, 0 replies; 4+ messages in thread
From: Nilesh Govindrajan @ 2013-03-09  9:44 UTC (permalink / raw
  To: Gentoo User Mailing List

On Sat, Mar 9, 2013 at 2:39 PM, Graham Murray <graham@gmurray.org.uk> wrote:
> Mike Gilbert <floppym@gentoo.org> writes:
>
>> On Fri, Feb 22, 2013 at 1:52 PM, Jarry <mr.jarry@gmail.com> wrote:
>>> So my question is: how is this possible? Is maybe ".config"
>>> file from the old sources-tree copied to new sources-tree?
>>> Or is the actual configuration of running kernel somehow
>>> detected and ".config" file generated?
>>>
>>
>> The latter. Have a look at DEFCONFIG_LIST init/Kconfig.
>
> So is it no longer necessary to run 'zcat /proc/config.gz > .config' to
> transfer the current configuration as a 'seed' when installing a new
> kernel?
>

That is porting your existing config to new kernel. You can't miss the
step, lol.
If you have genkernel, the simplest one would be

genkernel --kernel-config=/proc/config.gz

--
Nilesh Govindrajan
http://nileshgr.com


^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2013-03-09  9:45 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2013-02-22 18:52 [gentoo-user] "auto-config" of new gentoo-sources? Jarry
2013-02-22 20:12 ` Mike Gilbert
2013-03-09  9:09   ` Graham Murray
2013-03-09  9:44     ` Nilesh Govindrajan

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