linux-kernel - Re: Additional kconfig targets (cloneconfig, nonint

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Message-Id: <20080430080134.60346a12.randy.dunlap@oracle.com>
Date:	Wed, 30 Apr 2008 08:01:34 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	"SL Baur" <steve@...acs.org>
Cc:	"Andres Salomon" <dilinger@...ued.net>,
	"Sam Ravnborg" <sam@...nborg.org>,
	linux-kbuild <linux-kbuild@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"Dave Jones" <davej@...emonkey.org.uk>,
	"Roland McGrath" <roland@...hat.com>
Subject: Re: Additional kconfig targets (cloneconfig, nonint_oldconfig etc)

On Wed, 30 Apr 2008 03:45:57 -0700 SL Baur wrote:

> On 4/29/08, Andres Salomon <dilinger@...ued.net> wrote:
> > On Tue, 29 Apr 2008 20:35:31 +0200
> >  Sam Ravnborg <sam@...nborg.org> wrote:
> 
> >  > And we add support for a new 'commandline' parameter
> >  > 'K' so I can say:
> >  >
> >  > make K=/proc/config.gz defconfig
> >  > make K=i386_defconfig  defconfig
> >  > make K=i386_defconfig  oldconfig
> >  > make K=/proc/config.gz newconfig
> >  >
> >  > So K is used to specify what config file we use
> >  > to start out from.
> 
> I like this idea a lot.  I didn't like the hardcoded `.config' 13
> years ago and I still
> don't like it now.
> 
> >  Sounds good, I highly prefer specifying the config via env variable
> >  rather than embedded in the target (ie, 'make olpc_defconfig').
> 
> Is there any reasonable way to embed the configuration file name in the kernel
> image like BSD does it?  /proc/config.gz is a good way to retrieve way to
> retrieve configuration information on a running system, not so good for pushing
> kernels out to a network and keeping track of the config files on the build
> machine.

I don't know how BSD does it, but CONFIG_IKCONFIG does embed the
config image in the kernel.  It can be extracted with
scripts/extract-ikconfig.

> I don't have any way of checking this now, but can /proc files like
> /proc/config.gz
> be exported via NFS or the equivalent?

---
~Randy
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