linux-kernel - Re: [PATCH] Kbuild: move extra gcc check flags to the top Makefile

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Date:	Tue, 8 Apr 2014 17:18:25 +0200
From:	Sam Ravnborg <sam@...nborg.org>
To:	Michal Marek <mmarek@...e.cz>
Cc:	Masahiro Yamada <yamada.m@...panasonic.com>,
	linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org
Subject: Re: [PATCH] Kbuild: move extra gcc check flags to the top Makefile

On Tue, Apr 08, 2014 at 05:06:57PM +0200, Michal Marek wrote:
> On 2014-04-07 05:22, Masahiro Yamada wrote:
> > If W=... given to the command line, extra gcc check flags are added
> > to KBUILD_CFLAGS.
> > 
> > If we have such code in scripts/Makefile.build, the same flags are
> > added to KBUILD_CFLAGS multiple times becuase scripts/Makefile.build
> > is invoked every time Kbuild descends into the subdirectories.
> 
> Indeed. For three years, nobody has noticed that the gcc commandline is
> growing with every subdirectory.
I once had a patchset that moved all this out - to avoid this.
It was lost for various reasons.

The top-level Makefile is already too cluttered - so adding all this
is not good.
Moving it all to a dedicated file would be better.

	Sam
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