linux-kernel - Re: -fno-PIE, take #3

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Message-ID: <63c356a8-58a3-bc7e-88db-5c8071db15e1@zytor.com>
Date:   Mon, 7 Nov 2016 14:31:30 -0800
From:   "H. Peter Anvin" <hpa@...or.com>
To:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        linux-kernel@...r.kernel.org
Cc:     Michal Marek <mmarek@...e.com>, linux-kbuild@...r.kernel.org,
        x86@...nel.org, Al Viro <viro@...IV.linux.org.uk>,
        Ben Hutchings <ben@...adent.org.uk>,
        Sven Joachim <svenjoac@....de>,
        "Austin S. Hemmelgarn" <ahferroin7@...il.com>,
        Borislav Petkov <bp@...en8.de>
Subject: Re: -fno-PIE, take #3

On 11/04/16 11:39, Sebastian Andrzej Siewior wrote:
> Debian gcc's is nowdays compiled with --enable-default-pie which means it does
> -fPIE by default. This breaks atleast x86-64 compiles.
> This is the third attempt to fix it, this time by using runtime detection of
> the -fno-PIE compiler switch (it was introduced in gcc 3.4, min required gcc is
> currently 3.2) so it can be backported to the stable kernels.
> As noted by Al this won't fix `git bisect' of stable kernels prio this commit.
> However using always a wrapper around gcc which adds -fno-PIE is not sollution
> I want to rely in future.
> 
> Sebastian
> 

We don't support gcc < 3.4 on x86 platforms; I'm pretty sure it is broken.

	-hpa