Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756431AbcKDBIX (ORCPT ); Thu, 3 Nov 2016 21:08:23 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:47806 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754138AbcKDBIV (ORCPT ); Thu, 3 Nov 2016 21:08:21 -0400 Date: Fri, 4 Nov 2016 01:08:11 +0000 From: Al Viro To: Ben Hutchings Cc: Sebastian Andrzej Siewior , linux-kernel@vger.kernel.org, Sven Joachim , Tomas Janousek , Joe Perches , Adam Borowski , Michal Marek , linux-kbuild@vger.kernel.org Subject: Re: [PATCH 2/2] kbuild: add -fno-PIE Message-ID: <20161104010811.GD19539@ZenIV.linux.org.uk> References: <20161102172058.13641-1-bigeasy@linutronix.de> <20161102172058.13641-2-bigeasy@linutronix.de> <1478213455.29107.13.camel@decadent.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1478213455.29107.13.camel@decadent.org.uk> User-Agent: Mutt/1.7.0 (2016-08-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1608 Lines: 32 On Thu, Nov 03, 2016 at 04:50:55PM -0600, Ben Hutchings wrote: > On Wed, 2016-11-02 at 18:20 +0100, Sebastian Andrzej Siewior wrote: > > Debian started to build the gcc with -fPIE by default so the kernel > > build ends before it starts properly with: > > |kernel/bounds.c:1:0: error: code model kernel does not support PIC mode > > > > > > Also add to KBUILD_AFLAGSi due to: > > > > |gcc -Wp,-MD,arch/x86/entry/vdso/vdso32/.note.o.d … -mfentry -DCC_USING_FENTRY … vdso/vdso32/note.S > > |arch/x86/entry/vdso/vdso32/note.S:1:0: sorry, unimplemented: -mfentry isn’t supported for 32-bit in c ombination with -fpic > [...] > > Unfortunately this isn't sufficient: > > Cannot use CONFIG_CC_STACKPROTECTOR_STRONG: -fstack-protector-strong available but compiler is broken > /build/linux-4.9~rc3/Makefile:1069: recipe for target 'prepare-compiler-check' failed > make[5]: *** [prepare-compiler-check] Error 1 > > scripts/gcc-x86_64-has-stack-protector.sh has its own list of options > which will need to include -fno-PIE. That shit should be fixed in debian; no amount of kbuild changes will help on bisect going back to a state prior to those. IOW, no matter what we do kernel-side, that fuckup by doku, balint, et.al. needs to be fixed in debian gcc package. Al, seriously disappointed by that mess - debian gcc packagers are generally clued enough to have known better. Reassigning bug reports in question from gcc-6 to linux is beyond stupid; Balint is either being deliberately obtuse, or geniunely unable to imagine that somebody might be using the compiler _not_ for debian package builds.