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Message-ID: <20230826021054.GE3913@google.com>
Date:   Sat, 26 Aug 2023 11:10:54 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Tomasz Figa <tfiga@...omium.org>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Ying Sun <sunying@...iscas.ac.cn>,
        Jesse T <mr.bossman075@...il.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>,
        Jonathan Corbet <corbet@....net>, linux-kbuild@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH] kconfig: introduce listunknownconfig

On (23/08/26 10:10), Masahiro Yamada wrote:
> 
> I am considering how to implement it.
> 
> One way is to add env variables as a new request arises.
> 
> Sergey is doing two things by one option.
> 
>    KCONFIG_WARN_UNKNWON_SYMBOL : warn unknown symbol in input .config
> or defconfig
>    KCONFIG_WARN_TO_ERROR       : turn warnings into errors
> 
> Another way is to handle those as command line options.
> 
>   -Wunknown-symbol
>   -Werror             (associated with W=e)
>   -Wall               (associated with W=1)
> 
>   $ make W=1e olddefconfig
> 
> will work to sanity check.

Sounds good. Being able to choose whether those sanity checks are
warnings or errors is quite handful.

I don't have preferences as to implementation. Env variables seem to
have very clear and descriptive names. Command line options look fine
too. I'd probably prefer command line args.

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