From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752616AbdK2UAX (ORCPT ); Wed, 29 Nov 2017 15:00:23 -0500 Received: from mail.kernel.org ([198.145.29.99]:44728 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752014AbdK2UAW (ORCPT ); Wed, 29 Nov 2017 15:00:22 -0500 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org ADF6521943 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=acme@kernel.org Date: Wed, 29 Nov 2017 17:00:19 -0300 From: Arnaldo Carvalho de Melo To: Jiri Olsa Cc: Jiri Olsa , lkml , Ingo Molnar , Namhyung Kim , David Ahern , Peter Zijlstra Subject: Re: [PATCH 2/3] perf tools: Fix build for hardened environments Message-ID: <20171129200019.GB31403@kernel.org> References: <20171108102739.30338-1-jolsa@kernel.org> <20171108102739.30338-3-jolsa@kernel.org> <20171108160321.GC4333@kernel.org> <20171109073622.GB14419@krava> <20171109125212.GG4333@kernel.org> <20171110094325.GA18088@krava> <20171129195446.GA31403@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20171129195446.GA31403@kernel.org> X-Url: http://acmel.wordpress.com User-Agent: Mutt/1.9.1 (2017-09-22) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Em Wed, Nov 29, 2017 at 04:54:46PM -0300, Arnaldo Carvalho de Melo escreveu: > Em Fri, Nov 10, 2017 at 10:43:25AM +0100, Jiri Olsa escreveu: > > On Thu, Nov 09, 2017 at 09:52:12AM -0300, Arnaldo Carvalho de Melo wrote: > > > Right, since we want to honour what the distro makers decided was the > > > best set for them, and to be able to link with other libraries, etc. > > > > But then I think this should be done more explicitely, right? Do you > > > envision some way to do that without having to try to build perl or > > > python, that may not be installed, etc? > > > I'll check on it.. I think we could use feature detection and > > enable that by default and add NO_HARDENED_BUILD variable as > > we do for features.. and detect that python/perl or whatever > > else is using that and warn > > > > Of course users wanting to use something different may just set CFLAGS > > > and be done with it, in which case I think this should also affect the > > > perl and python CFLAGS, removing that distro specific stuff since the > > > user is changing something different. > > > yep > > Even with this patch applied, as a stopgap solution to allow me to build > a full featured tool on f27, I get this leftover: > > LINK /tmp/build/perf/perf > /usr/bin/ld: /tmp/build/perf/libperf.a(libperf-in.o): relocation R_X86_64_32S against symbol `inat_primary_table' can not be used when making a shared object; recompile with -fPIC > /usr/bin/ld: final link failed: Nonrepresentable section on output > collect2: error: ld returned 1 exit status > > > Looking at the Intel PT bits now... Nevermind, I did a full rebuild and this is not there anymore, some build artifact with that file :-\ - Arnaldo