Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756463AbcLPUfC (ORCPT ); Fri, 16 Dec 2016 15:35:02 -0500 Received: from mail-it0-f68.google.com ([209.85.214.68]:34976 "EHLO mail-it0-f68.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752203AbcLPUev (ORCPT ); Fri, 16 Dec 2016 15:34:51 -0500 MIME-Version: 1.0 In-Reply-To: <3679707.TKdvBNIRe2@wuerfel> References: <20161216105634.235457-1-arnd@arndb.de> <3679707.TKdvBNIRe2@wuerfel> From: Geert Uytterhoeven Date: Fri, 16 Dec 2016 21:34:49 +0100 X-Google-Sender-Auth: Mj5hP-h9--_cDy_62sZ6w45cs-g Message-ID: Subject: Re: [RFC] minimum gcc version for kernel: raise to gcc-4.3 or 4.6? To: Arnd Bergmann Cc: Linux-Arch , linux-kbuild , "linux-kernel@vger.kernel.org" , linux-arm-kernel@vger.kernel.org, Russell King , Andrew Morton , kernel-build-reports@lists.linaro.org, kvmarm@lists.cs.columbia.edu Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1639 Lines: 36 Hi Arnd, On Fri, Dec 16, 2016 at 8:58 PM, Arnd Bergmann wrote: > On Friday, December 16, 2016 4:54:33 PM CET Geert Uytterhoeven wrote: >> On Fri, Dec 16, 2016 at 11:56 AM, Arnd Bergmann wrote: >> > Specifically on ARM, going further makes things rather useless especially >> > for build testing: with gcc-4.2, we lose support for ARMv7, EABI, and >> > effectively ARMv6 (as it relies on EABI for building reliably). Also, >> > the number of false-positive build warnings is so high that it is useless >> > for finding actual bugs from the warnings. >> >> If you start with that activity now, there's indeed a massive amount of >> warnings to look into. >> However, I've been build testing various configs with m68k-linux-gnu-gcc-4.1.2 >> and looking at the compiler warnings for years, so I only have to look >> at new warnings. > > What's the reason for sticking with gcc-4.1? Does this actually work better > for you than a more recent version, or is it just whatever you installed > when you started the build testing? It's just the cross compiler I built .debs of a long time ago. As long as it works, I see no reason to upgrade, especially as long as I see warnings for bugs that no one else is seeing. But lately you started beating me with newer gccs ;-) Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds