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

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Date:   Wed, 8 Jun 2022 20:48:51 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Zev Weiss <zev@...ilderbeest.net>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kconfig: Add findconf script and helper program



On 6/8/22 20:46, Zev Weiss wrote:
> On Wed, Jun 08, 2022 at 07:48:44PM PDT, Randy Dunlap wrote:
>> 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
> 
> I'm guessing 'findconfig' here is some personal shell 
> alias/function/script?  (I can't see any references to it in the kernel 
> source tree.)
> 

Yes, it's just local.

>>
>> 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
>>
> 
> This I assume is just due to the contents of your .config file relative 
> to the current Kconfig definitions and not a problem with anything in 
> this patch?

There is no .config file in the linux/ source tree at the top level.
I use O=build_dir for all builds.

> 
>> How do I specify/choose a .config file to be used?
>>
>> Oh, use KCONFIG_CONFIG=filename
>>
> 
> Ah, I guess that'd be a nice thing to add a flag for to the wrapper 
> script -- I'll include that in v2.
> 
>>
>> Please update (add) usage/help text in scripts/kconfig/Makefile.
>>
> 
> Ack, will do.
> 
> 
> Thanks for the review!
> 
> 
> Zev
>