linux-kernel - Re: [patch 5/5] Add the -fstack-protector option to the CFLAGS

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Message-Id: <20060728.161215.98863664.davem@davemloft.net>
Date:	Fri, 28 Jul 2006 16:12:15 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	Valdis.Kletnieks@...edu
Cc:	arjan@...ux.intel.com, ak@...e.de, linux-kernel@...r.kernel.org,
	akpm@...l.org
Subject: Re: [patch 5/5] Add the -fstack-protector option to the CFLAGS

From: Valdis.Kletnieks@...edu
Date: Fri, 28 Jul 2006 19:05:40 -0400

> On Fri, 28 Jul 2006 20:48:31 +0200, Arjan van de Ven said:
> > On Fri, 2006-07-28 at 20:45 +0200, Andi Kleen wrote:
> > > > +ifdef CONFIG_CC_STACKPROTECTOR
> > > > +CFLAGS += $(call cc-ifversion, -lt, 0402, -fno-stack-protector)
> > > > +CFLAGS += $(call cc-ifversion, -ge, 0402, -fstack-protector)
> > > 
> > > Why can't you just use the normal call cc-option for this?
> > 
> > this requires gcc 4.2; cc-option is not useful for that.
> 
> At least some things calling themselves 4.1.1 include it.  On a Fedora

Your gcc-4.1.1 includes the -fstack-protector feature, but it might
not have the gcc bug fix necessary to make that feature work on the
kernel compile, which is why the version check is necessary.
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