linux-kernel - RE: Build failures with gcc 4.5 and older

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Date:   Thu, 16 Aug 2018 09:17:32 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Linus Torvalds' <torvalds@...ux-foundation.org>
CC:     Guenter Roeck <linux@...ck-us.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Rik van Riel <riel@...riel.com>,
        "Mike Galbraith" <efault@....de>,
        Dave Hansen <dave.hansen@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: RE: Build failures with gcc 4.5 and older

From: Linus Torvalds
> Sent: 15 August 2018 17:34
> To: David Laight
> Cc: Guenter Roeck; Linux Kernel Mailing List; Rik van Riel; Mike Galbraith; Dave Hansen; Andrew Morton
> Subject: Re: Build failures with gcc 4.5 and older
> 
> On Wed, Aug 15, 2018 at 9:16 AM David Laight <David.Laight@...lab.com> wrote:
> >
> > >
> > > But some libelf bug that is less than a year old is likely to bite people.
> >
> > See https://lkml.org/lkml/2017/9/10/186 for the libelf fix.
> > It isn't anything like as rare as those emails suggest.
> > An 'allmodconfig' build fails on a lot of object files after 4.15-rc9.
> 
> Ok, but that patch that fixes it was merged a long time ago already.
> See commit 97dab2ae7e84 ("objtool: Fix object file corruption")
> 
> So I'm a bit confused by your issue. The thing you point to from last
> year was literall fixed and committed to the tree in a couple of days
> days.

Hmmm... I still had to update from libelf-0.153.so to libelf-0.165.so
in order to get the output from objtool to be valid.
I'm sure I'd seen a patch to libelf as well.

	David

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