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Date: Tue, 23 Sep 2014 13:52:05 +0200
From: Hinnerk van Bruinehsen <h.v.bruinehsen@fu-berlin.de>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] "stack-protector-strong" option results in gcc
error
Message-ID: <20140923115204.GA23337@TranscendTheRubicon.alshain.ring0>
References: <20140923024941.GA2848@waltdnes.org>
<CAJ1xhMVPaWUnam+ZPp-BBrw=sYSu_BXN_NxdmuMB8ON83o75tg@mail.gmail.com>
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On Tue, Sep 23, 2014 at 09:16:42AM +0300, Alexander Kapshuk wrote:
> On Tue, Sep 23, 2014 at 5:49 AM, Walter Dnes <waltdnes@waltdnes.org> wrot=
e:
> > CHK include/generated/utsrelease.h
> > UPD include/generated/utsrelease.h
> > CC kernel/bounds.s
> > gcc: error: unrecognized command line option '-fstack-protector-strong'
> > make[1]: *** [kernel/bounds.s] Error 1
> > make: *** [prepare0] Error 2
> >
> > I switched stack-protector to "regular", and it built OK. I rebooted
> > into it, and it works OK.
> >
> > My gcc version data...
> >
> > [d531][root][/usr/src/linux] gcc --version
> > gcc (Gentoo 4.7.3-r1 p1.4, pie-0.5.5) 4.7.3
> > Copyright (C) 2012 Free Software Foundation, Inc.
> > This is free software; see the source for copying conditions. There is=
NO
> > warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURP=
OSE.
> >
> > My install is 32-bit
> >
> > [d531][waltdnes][~] uname -a
> > Linux d531 3.14.16-gentoo #1 SMP Mon Sep 22 20:43:33 EDT 2014 i686 Inte=
l(R) Core(TM)2 Duo CPU E4600 @ 2.40GHz GenuineIntel GNU/Linux
> >
> > --
> > Walter Dnes <waltdnes@waltdnes.org>
> > I don't run "desktop environments"; I run useful applications
> >
>=20
> Looks like support for '-fstack-protector-strong' was implemented in
> more recent versions of gcc. The the URL below for details:
>=20
> https://securityblog.redhat.com/tag/stack-protector/
'-fstack-protector-strong' is supported as of gcc-4.9.x - unless you upgrad=
e,
you'll forced to use the regular one.
If you want more information on the option take a look here:
http://www.outflux.net/blog/archives/2014/01/27/fstack-protector-strong/
I think it's not even that unlikely that you don't even want the strong
version.
WKR
Hinnerk
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