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

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Message-ID: <20090418180953.GE7148@flint.arm.linux.org.uk>
Date:	Sat, 18 Apr 2009 19:09:53 +0100
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	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>
Subject: Re: kbuild - introduce support for subdir-ccflags-y

On Sat, Apr 18, 2009 at 05:07:50PM +0200, Ingo Molnar wrote:
> 
> * 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.

Please read _all_ of my mail, particularly the bit where it talks about
it being useful for a certain subset.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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