linux-kernel - Re: [PATCH] kconfig: Add a build target for checking current config for issues

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Message-ID: <CAK7LNASbgXSZNiwhMf8jm7511eyDm8oCqY=MzWhgWwNuVLk5Vw@mail.gmail.com>
Date: Fri, 29 Dec 2023 01:10:57 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: Tomasz Figa <tfiga@...omium.org>
Cc: linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Sergey Senozhatsky <senozhatsky@...omium.org>
Subject: Re: [PATCH] kconfig: Add a build target for checking current config
 for issues

On Thu, Dec 28, 2023 at 4:09 PM Tomasz Figa <tfiga@...omium.org> wrote:
>
> The new target is called 'checkconfig' and currently is basically an
> alias for `listnewconfig` with KCONFIG_WARN_UNKNOWN_SYMBOLS set to true.
> It can be used to validate if the current config is directly compatible
> with the current kernel version or needs some manual adjustment.
>
> Signed-off-by: Tomasz Figa <tfiga@...omium.org>


I rejected a new target in the past.

https://lore.kernel.org/all/20230817012007.131868-1-senozhatsky@chromium.org/T/#m55c37e3091158f8cb008d9e0b5c6bf3f5ead225a



Instead, you can run

  KCONFIG_WARN_UNKNOWN_SYMBOLS=1 make listnewconfig

or

  make W=c listnewconfig









> ---
>  scripts/kconfig/Makefile | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
> index 4eee155121a8..501cb9b76414 100644
> --- a/scripts/kconfig/Makefile
> +++ b/scripts/kconfig/Makefile
> @@ -81,6 +81,9 @@ PHONY += savedefconfig defconfig
>  savedefconfig: $(obj)/conf
>         $(Q)$< $(silent) --$@...fconfig $(Kconfig)
>
> +checkconfig: $(obj)/conf
> +       $(Q)KCONFIG_WARN_UNKNOWN_SYMBOLS=true $< --listnewconfig $(Kconfig)
> +
>  defconfig: $(obj)/conf
>  ifneq ($(wildcard $(srctree)/arch/$(SRCARCH)/configs/$(KBUILD_DEFCONFIG)),)
>         @$(kecho) "*** Default configuration is based on '$(KBUILD_DEFCONFIG)'"
> @@ -144,6 +147,7 @@ help:
>         @echo  '                    default value without prompting'
>         @echo  '  tinyconfig      - Configure the tiniest possible kernel'
>         @echo  '  testconfig      - Run Kconfig unit tests (requires python3 and pytest)'
> +       @echo  '  checkconfig     - Check current config for unrecognized and new symbols'
>         @echo  ''
>         @echo  'Configuration topic targets:'
>         @$(foreach f, $(all-config-fragments), \
> --
> 2.43.0.472.g3155946c3a-goog
>


--
Best Regards

Masahiro Yamada