linux-kernel - Re: [PATCH 2/2] kbuild: add -fno-PIE

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Message-ID: <20161104162504.GA7375@angband.pl>
Date:   Fri, 4 Nov 2016 17:25:04 +0100
From:   Adam Borowski <kilobyte@...band.pl>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc:     Al Viro <viro@...IV.linux.org.uk>,
        Christoph Hellwig <hch@...radead.org>,
        "Austin S. Hemmelgarn" <ahferroin7@...il.com>,
        Ben Hutchings <ben@...adent.org.uk>,
        linux-kernel@...r.kernel.org, Sven Joachim <svenjoac@....de>,
        Tomas Janousek <tomi@...i.cz>, Joe Perches <joe@...ches.com>,
        Michal Marek <mmarek@...e.com>, linux-kbuild@...r.kernel.org,
        doko@...ian.org
Subject: Re: [PATCH 2/2] kbuild: add -fno-PIE

On Fri, Nov 04, 2016 at 04:58:55PM +0100, Sebastian Andrzej Siewior wrote:
> On 2016-11-04 15:54:27 [+0000], Al Viro wrote:
> > Christoph, would you mind rereading what I posted upthread?  I *am* aware of
> > that clusterfuck, including the Balint's charming games with the reassignments,
> > etc.  Directly affected by the whole mess, actually.
> 
> Al, I am re-doing the patch with a runtime check for -fno-PIE and
> tagging it stable and looking after Ben's fstack protector thingy.
> This should allow you to compile maintained stable kernels but it won't
> allow you to bisect to prior versions.
> I don't see any other way around it.

As you guys don't want Gentooish attempts to check if gcc is compiling the
kernel, what about making/requesting a wrapper that calls gcc with the
appropriate options (-fno-PIE and whatever is needed for fstack protector)?

This would require manually appending CC=the-wrapper to make but would allow
bisects.  And come on, any solution with no bisects is rather ridiculous.


Meow!
-- 
A MAP07 (Dead Simple) raspberry tincture recipe: 0.5l 95% alcohol, 1kg
raspberries, 0.4kg sugar; put into a big jar for 1 month.  Filter out and
throw away the fruits (can dump them into a cake, etc), let the drink age
at least 3-6 months.