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Date: Fri, 15 Dec 2017 20:50:59 +0100
From: Sam Ravnborg <sam@ravnborg.org>
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
        Ulf Magnusson <ulfalizer@gmail.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
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        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
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Subject: Re: [PATCH 0/3] kbuild,kconfig: generate lexer/parser C files
 instead of copying _shipped files
Message-ID: <20171215195059.GA10168@ravnborg.org>
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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.

	Sam