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Date:   Fri, 15 Dec 2017 20:50:59 +0100
From:   Sam Ravnborg <>
To:     Masahiro Yamada <>
Cc:     Linux Kbuild mailing list <>,
        Ulf Magnusson <>,
        Linus Torvalds <>,
        Mauro Carvalho Chehab <>,
        Nicholas Piggin <>,
        Kate Stewart <>,
        Markus Heiser <>,
        "open list:DOCUMENTATION" <>,
        Borislav Petkov <>,
        Linux Kernel Mailing List <>,
        Thomas Gleixner <>,
        Jonathan Corbet <>,
        Michal Marek <>,
        SeongJae Park <>,
        Greg Kroah-Hartman <>,
        Philippe Ombredanne <>,
        Max Filippov <>
Subject: Re: [PATCH 0/3] kbuild,kconfig: generate lexer/parser C files
 instead of copying _shipped files

Hi Masahiro.

> > In Linux build system convention, pre-generated files are version-
> > controlled with a "_shipped" suffix.  During the kernel building,
> > they are simply shipped (copied) removing the suffix.
> >
> > From users' point of view, this approach can reduce external tool
> > dependency for the kernel build,
> >
> > From developers point of view, it is tedious to manually regenerate
> > such artifacts.  In fact, we see several patches to regenerate
> > _shipped files.  They are noise commits.

Nice cleanup we should have does years ago.
When we introduced this we did this to minimize the time
it took to configure a clean kernel - as one of the reasons.
Since then the average computer has been significantly faster
so the time to run flex/bison is not an issue anymore.


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