linux-kernel - Re: [PATCH kmod v2 3/4] kmod: Add config command to show compile time configuration as JSON

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Message-ID: <20230714140229.GJ9196@kitsune.suse.cz>
Date:   Fri, 14 Jul 2023 16:02:29 +0200
From:   Michal Suchánek <msuchanek@...e.de>
To:     Jan Engelhardt <jengelh@...i.de>
Cc:     linux-modules@...r.kernel.org, Takashi Iwai <tiwai@...e.com>,
        Lucas De Marchi <lucas.de.marchi@...il.com>,
        Michal Koutný <mkoutny@...e.com>,
        Jiri Slaby <jslaby@...e.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH kmod v2 3/4] kmod: Add config command to show compile
 time configuration as JSON

Hello,

On Fri, Jul 14, 2023 at 03:52:05PM +0200, Jan Engelhardt wrote:
> 
> On Wednesday 2023-07-12 16:00, Michal Suchanek wrote:
> 
> >Show prefix (where configuration files are searched/to be installed),
> >module compressions, and module signatures supported.
> 
> What about doing it like systemd and generate a .pc file instead 
> that can then be queried like so, e.g.:
> 
> $ pkg-config kmod --variable=modulesdir
> /usr/lib/modules

 - AFAICS tools packed with kernel generate but do not consume .pc files
   while JSON and jq are commonly used througout the kernel ecosystem
 - .pc files would be shipped with libkmod development package, not the
   kmod tool in a binary distribution

Other than that JSON and .pc files are roughly quivalent in usability.

Thanks

Michal