From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933953AbbI1N6s (ORCPT ); Mon, 28 Sep 2015 09:58:48 -0400 Received: from pandora.arm.linux.org.uk ([78.32.30.218]:52861 "EHLO pandora.arm.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932920AbbI1N6r (ORCPT ); Mon, 28 Sep 2015 09:58:47 -0400 Date: Mon, 28 Sep 2015 14:58:41 +0100 From: Russell King - ARM Linux To: Geert Uytterhoeven Cc: "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , linux-kbuild Subject: Re: Build regressions/improvements in v4.3-rc3 Message-ID: <20150928135841.GV21513@n2100.arm.linux.org.uk> References: <1443382476-12171-1-git-send-email-geert@linux-m68k.org> <20150928093006.GT21513@n2100.arm.linux.org.uk> <20150928094836.GU21513@n2100.arm.linux.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Sep 28, 2015 at 03:50:16PM +0200, Geert Uytterhoeven wrote: > Hi Russell, > > On Mon, Sep 28, 2015 at 11:48 AM, Russell King - ARM Linux > wrote: > > Also, a great many of the failures are due to the build toolchain not > > supporting -fstack-protector-strong. I think it's absolutely right > > for the build to error out if you enable a kernel feature which requires > > toolchain support, but the toolchain does not support that feature. > > > > What this means is that the build results from kissb are less than > > useful - without spending ages looking at every single build, it's > > hard to find the real failures we care about. > > > > I'd suggest that either the randconfig is seeded to ensure that > > CONFIG_CC_STACKPROTECTOR_STRONG is always disabled in ARM randconfigs, > > or that the ARM toolchain is updated to support this feature. > > Or that it's impossible to enable this feature if your toolchain doesn't > support it? I think that would require kconfig to call out to the compiler to run a test build. This kind of thing has been talked about in the past but the feature never seems to appear - probably because it would end up increasing the kconfig startup time in every case. -- FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net.