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

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Date:	Sat, 26 Feb 2011 14:50:06 -0500
From:	Arnaud Lacombe <lacombar@...il.com>
To:	Jeff Mahoney <jeffm@...e.com>
Cc:	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 Thu, Feb 24, 2011 at 9:35 PM, Jeff Mahoney <jeffm@...e.com> wrote:
> Cloneconfig takes the first configuration it finds which appears
> to belong to the running kernel, and configures the kernel sources
> to match this configuration as closely as possible.
>
> Signed-off-by: Andreas Gruenbacher <agruen@...e.de>
> Signed-off-by: Jeff Mahoney <jeffm@...e.com>
> ---
>  scripts/kconfig/Makefile |   17 +++++++++++++++++
>  1 file changed, 17 insertions(+)
>
> --- a/scripts/kconfig/Makefile
> +++ b/scripts/kconfig/Makefile
> @@ -99,6 +99,23 @@ PHONY += allnoconfig allyesconfig allmod
>
>  allnoconfig allyesconfig allmodconfig alldefconfig randconfig: $(obj)/conf
>        $< --$@ $(Kconfig)
> +
> +UNAME_RELEASE := $(shell uname -r)
> +CLONECONFIG := $(firstword $(wildcard /proc/config.gz \
> +                                     /lib/modules/$(UNAME_RELEASE)/.config \
> +                                     /etc/kernel-config \
> +                                     /boot/config-$(UNAME_RELEASE)))
> +cloneconfig: $(obj)/conf
> +       $(Q)case "$(CLONECONFIG)" in                            \
> +       '')     echo -e "The configuration of the running"      \
> +                       "kernel could not be determined\n";     \
You do not need the '\n', nor the '-e', echo(1) appends a newline by default.

> +               false ;;                                        \
> +       *.gz)   gzip -cd $(CLONECONFIG) > .config.running ;;    \
> +       *)      cat $(CLONECONFIG) > .config.running ;;         \
> +       esac &&                                                 \
> +       echo -e "Cloning configuration file $(CLONECONFIG)\n"
see above.

> +       $(Q)$< -D .config.running arch/$(SRCARCH)/Kconfig
> +
>
>  PHONY += listnewconfig oldnoconfig savedefconfig defconfig
>
> --
> Jeff Mahoney
> SUSE Labs
> --
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