linux-kernel - Re: [PATCH] kbuild: fix dependency generation

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Message-Id: <E1HY2Kf-0002QC-O3@flower>
Date:	Sun, 1 Apr 2007 17:51:05 +0200
From:	Oleg Verych <olecom@...wer.upol.cz>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Linus Torvalds <torvalds@...l.org>, Andrew Morton <akpm@...l.org>,
	stable@...nel.org, LKML <linux-kernel@...r.kernel.org>,
	Jan Beulich <jbeulich@...ell.com>
Subject: Re: [PATCH] kbuild: fix dependency generation

> From: Sam Ravnborg
> Newsgroups: gmane.linux.kernel
> Subject: [PATCH] kbuild: fix dependency generation
> Date: Sun, 1 Apr 2007 12:45:51 +0200
>
[]
>  scripts/basic/fixdep.c |   10 +++++++---
>  1 files changed, 7 insertions(+), 3 deletions(-)
>
> diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
> index 668a11a..24144a2 100644
> --- a/scripts/basic/fixdep.c
> +++ b/scripts/basic/fixdep.c
> @@ -28,9 +28,11 @@
>   * the dependency on linux/autoconf.h by a dependency on every config
>   * option which is mentioned in any of the listed prequisites.
>   *
> - * To be exact, split-include populates a tree in include/config/,
> - * e.g. include/config/his/driver.h, which contains the #define/#undef
> - * for the CONFIG_HIS_DRIVER option.
> + * kconfig populates a tree in include/config/ with an empty file
> + * for each config symbol and when the configuration is updated
> + * the files representing changed config options are touched
> + * which thern let make pick up the changes and the files that uses
            ^ then?                                               ^ use?
> + * the config symbols are rebuild.
                             ^ rebuilt?

Just in case that's wrong (IANALang, of course :)

>   *
>   * So if the user changes his CONFIG_HIS_DRIVER option, only the objects
>   * which depend on "include/linux/config/his/driver.h" will be rebuilt,
> @@ -245,6 +247,8 @@ void parse_config_file(char *map, size_t len)
>  		continue;
>  
>  	found:
> +		if (!memcmp(q - 7, "_MODULE", 7))
> +			q -= 7;
>  		use_config(p+7, q-p-7);
>  	}
>  }
> -- 
> 1.5.1.rc3.20.gaa453
>
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