From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 51385 invoked by alias); 17 Oct 2018 15:51:34 -0000 Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org Received: (qmail 51354 invoked by uid 89); 17 Oct 2018 15:51:32 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-2.4 required=5.0 tests=AWL,BAYES_00,SPF_HELO_PASS,SPF_PASS autolearn=ham version=3.3.2 spammy=our, HContent-Transfer-Encoding:8bit X-HELO: smtp.polymtl.ca Received: from smtp.polymtl.ca (HELO smtp.polymtl.ca) (132.207.4.11) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Wed, 17 Oct 2018 15:51:29 +0000 Received: from simark.ca (simark.ca [158.69.221.121]) (authenticated bits=0) by smtp.polymtl.ca (8.14.7/8.14.7) with ESMTP id w9HFpNKR016179 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 17 Oct 2018 11:51:27 -0400 Received: by simark.ca (Postfix, from userid 112) id F35471EA6F; Wed, 17 Oct 2018 11:51:22 -0400 (EDT) Received: from simark.ca (localhost [127.0.0.1]) by simark.ca (Postfix) with ESMTP id DEA1D1E4C2; Wed, 17 Oct 2018 11:51:21 -0400 (EDT) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Date: Wed, 17 Oct 2018 15:51:00 -0000 From: Simon Marchi To: Pedro Alves Cc: Jan Vrany , Tom Tromey , gdb-patches@sourceware.org Subject: Re: [PATCH] Fix various tests to use -no-pie linker flag when needed In-Reply-To: <4e2d9d5a-5381-faf1-a5ee-425158f07b97@redhat.com> References: <20180828193643.15530-1-jan.vrany@fit.cvut.cz> <87lg8dvy0o.fsf@tromey.com> <9dbaccd25aae8bdf1cd96e59ae8f7c9be9cce7db.camel@fit.cvut.cz> <01b5605a3df81c4d773a82e8648051fa@polymtl.ca> <4e2d9d5a-5381-faf1-a5ee-425158f07b97@redhat.com> Message-ID: X-Sender: simon.marchi@polymtl.ca User-Agent: Roundcube Webmail/1.3.6 X-IsSubscribed: yes X-SW-Source: 2018-10/txt/msg00373.txt.bz2 On 2018-10-17 11:47, Pedro Alves wrote: > On 10/16/2018 11:18 PM, Simon Marchi wrote: >> On 2018-10-14 05:59, Jan Vrany wrote: > >>> No, I don't know how universal -no-pie is. From what I have >>> understood >>> from Simon >>> (https://sourceware.org/ml/gdb-patches/2018-08/msg00662.html), >>> out of the options available -no-pie is still the best bet. >> >> gcc supports it, icc supports it [1], clang supports it starting at >> version 6 according to my testing. I think this is universal >> enough that we can use it. If somebody stumbles on a compiler that >> does not understand -no-pie and they really need to use it for >> their testing, they can quite easily add an option for gdb_compile. > > Not sure it's that universal. See: > > https://github.com/xd009642/tarpaulin/issues/7#issuecomment-317180523 > > For example, the gcc 4.8 I have handy (our minimum supported version) > does > not support it: > > $ /opt/gcc-4.8/bin/gcc /home/pedro/gdb/tests/main.c -o main -no-pie > gcc: error: unrecognized command line option ‘-no-pie’ Ah, I just assumed that gcc supported it since virtually forever, but no. >> But for now, I don't think it's worth the extra work. > > I disagree. Given that new information, I agree with you disagreeing. Simon