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

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Message-ID: <20180815164951.GA30932@roeck-us.net>
Date:   Wed, 15 Aug 2018 09:49:51 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Tony Luck <tony.luck@...il.com>
Cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        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

On Wed, Aug 15, 2018 at 09:09:17AM -0700, Tony Luck wrote:
> On Tue, Aug 14, 2018 at 1:19 PM Tony Luck <tony.luck@...il.com> wrote:
> > My ia64 test box only has 4.3.4.  I seem to remember some pain points
> > with newer versions of gcc on ia64. I need to poke around and find one
> > new enough to get past this problem, but that still works for kernel building.
> 
> I had problems trying to build an up to date (or even a slightly old)
> gcc starting from 4.3.4.
> 

Ah yes, one of those little details: Older versions of gcc don't
build anymore with recent versions of gcc.

> I did manage to build 4.6.4.
> 
> 4.6.4 built git HEAD* that failed yesterday using 4.3.4. It boots OK.
> 
FWIW, I use gcc 8.1.0 (from kernel.org) for my ia64 test builds.
Of course, I have no idea if those builds actually create bootable images.

Guenter