linux-kernel - Re: [PATCH] Add ``cloneconfig'' target

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Date:	Sat, 26 Feb 2011 14:47:01 -0500
From:	Arnaud Lacombe <lacombar@...il.com>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Jeff Mahoney <jeffm@...e.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Roman Zippel <zippel@...ux-m68k.org>,
	linux-kbuild@...r.kernel.org
Subject: Re: [PATCH] Add ``cloneconfig'' target

Hi,

On Fri, Feb 25, 2011 at 1:07 AM, Sam Ravnborg <sam@...nborg.org> wrote:
> We already have something remotely similar in kconfig.
> We use the following list:
> config DEFCONFIG_LIST
>        string
>        depends on !UML
>        option defconfig_list
>        default "/lib/modules/$UNAME_RELEASE/.config"
>        default "/etc/kernel-config"
>        default "/boot/config-$UNAME_RELEASE"
>        default "$ARCH_DEFCONFIG"
>        default "arch/$ARCH/defconfig"
>
I may argue that anything within the Linux tree which point
_by_default_ to something outside the tree itself is broken. Say I try
to build a Linux kernel on a system with has its own non-kconfig
`/etc/kernel-config', I guess this would make the configuration fail.

> It would be better to teach kconfig to read /proc/config.gz
> and then add it to the list above.
>
Why ? Thing should be kept simple. kconfig's job is not to know about
the trillion file format which exist in the world, even more if the
implementation is made by building a command[0], executing it in a
separate process and reading the output. This is the shell's job. What
may be useful in the contrary would be to eventually teach kconfig to
read from <stdin>.

 - Arnaud

[0]: which is built depending on an extension, which is even more awful ...

> This list is used if you just type "make enuconfig" without
> any configuration.
>
>        Sam
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