linux-kernel - Re: kbuild - introduce support for subdir-ccflags-y

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Date:	Sat, 18 Apr 2009 17:07:50 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Sam Ravnborg <sam@...nborg.org>,
	linux-kbuild <linux-kbuild@...r.kernel.org>,
	linux arch <linux-arch@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	"David S. Miller" <davem@...emloft.net>,
	Russell King <rmk+lkml@....linux.org.uk>
Subject: Re: kbuild - introduce support for subdir-ccflags-y


* Russell King <rmk+lkml@....linux.org.uk> wrote:

> On Sat, Apr 18, 2009 at 02:51:59PM +0200, Sam Ravnborg wrote:
> > The typical use cases are an architecture or a subsystem that
> > decide to cover all files with -Werror.
> > Today alpha, mips and sparc uses -Werror in almost all their
> > Makefile - with subdir-ccflag-y it is now simpler to do so
> > as only the top-level directories needs to be covered.
> 
> Hmm, this won't make sense for ARM.  We have things like #warning 
> and deprecated functions in machine specific headers, and adding 
> -Werror to the whole of arch/arm/ will result in these causing 
> builds to fail.

This is optional - if you dont want it, you dont set it.

	Ingo
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