linux-kernel - Re: [PATCH] kconfig: Add findconf script and helper program

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Message-ID: <6d6d252d-79e9-4b4c-4a62-aa4018a6254c@infradead.org>
Date:   Wed, 8 Jun 2022 19:48:44 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Zev Weiss <zev@...ilderbeest.net>,
        Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kconfig: Add findconf script and helper program

Hi--

On 6/8/22 02:54, Zev Weiss wrote:
> scripts/findconf provides menuconfig's search functionality as a
> standalone, non-interactive command, somewhat in the spirit of
> scripts/config.  It is meant to be useful for tasks like getting a
> quick overview of symbol dependencies or determining which Kconfig
> file to edit for a given symbol, without having to fire up one of the
> interactive config programs.
> 
> It accepts a single command-line flag, '-v', which causes it to also
> print the help text of each matching result.
> 
> Signed-off-by: Zev Weiss <zev@...ilderbeest.net>
> ---

I can see how this could be useful.
It's a little easier to use than what I currently do:

$ findconfig  DRM_HISI_HIBMC
./drivers/gpu/drm/hisilicon/hibmc/Kconfig:2:config DRM_HISI_HIBMC

then $EDITOR that_Kconfig_file


In testing, I am seeing this:

#
# using defaults found in /boot/config-5.3.18-150300.59.63-default
#
.config:421:warning: symbol value 'm' invalid for I8K
.config:2335:warning: symbol value 'm' invalid for MTD_NAND_ECC_SW_HAMMING
.config:2484:warning: symbol value 'm' invalid for PVPANIC
.config:8671:warning: symbol value 'm' invalid for INTERCONNECT
.config:9369:warning: symbol value 'm' invalid for CRYPTO_ARCH_HAVE_LIB_BLAKE2S
.config:9370:warning: symbol value 'm' invalid for CRYPTO_LIB_BLAKE2S_GENERIC
.config:9653:warning: symbol value '1' invalid for KASAN_STACK

How do I specify/choose a .config file to be used?

Oh, use KCONFIG_CONFIG=filename


Please update (add) usage/help text in scripts/kconfig/Makefile.

> 
> This works a bit differently from [gmnq]conf in that it accepts (and
> requires) arguments, but I couldn't see an easy/obvious way of passing
> command-line args through the makefile infrastructure that invokes
> those, so the wrapper script passes things to it via environment
> variables instead.  Suggestions welcome if there's a nicer way of
> achieving that.
> 
>  scripts/findconf           | 22 ++++++++++++
>  scripts/kconfig/.gitignore |  1 +
>  scripts/kconfig/Makefile   |  7 +++-
>  scripts/kconfig/findconf.c | 74 ++++++++++++++++++++++++++++++++++++++
>  scripts/kconfig/lkc.h      |  1 +
>  scripts/kconfig/menu.c     |  2 +-
>  6 files changed, 105 insertions(+), 2 deletions(-)
>  create mode 100755 scripts/findconf
>  create mode 100644 scripts/kconfig/findconf.c
> 

thanks.
-- 
~Randy