From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pj1-x102f.google.com (mail-pj1-x102f.google.com [IPv6:2607:f8b0:4864:20::102f]) by sourceware.org (Postfix) with ESMTPS id 356A73857C66; Thu, 18 Nov 2021 16:56:48 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 356A73857C66 Received: by mail-pj1-x102f.google.com with SMTP id gb13-20020a17090b060d00b001a674e2c4a8so6260448pjb.4; Thu, 18 Nov 2021 08:56:48 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=XYj0+k12OSONX+FiZ4xvnss1HSm7P5ZwP+C8wZu0zFM=; b=wIy9w6FzsJiAhWwYWmUDZOE/0DF7vxIefNeFR/XemqSEjPgZz7bnAf1r7/DMjJ6lgr vSxMb7h9hyyPzUYiTorjAXRLnNsGaX5DzU1CUJN2FUbfeLk9Tr9aMOYOlm+17pNXyO0W VmLNuzyODf3Sm+DdlACWDYEWMjr4Z1mOY1uKBO+HT+fhE7vonq9ZWzTfPG948bBBDRw0 bJl0k0gmn/4SJyvBTd+u3dAPUBDMss0+4EICYMbskRcxZZF/9jsZyuREUvONk0OIGF04 RMv/AjmVdTFL+dqhbLpDbSUDOf6MB0ijvYJjHkPA/Bd3TpgUANXSCxNUl3eBEdyV+t+d JZ6w== X-Gm-Message-State: AOAM530wH4KX3LFrmHdNGfNKa8Q8dvgU3oJklZBqLoRhNMm/987seCQG aoevHjykjAv/ORE3KfKutQilschyt2hJGnJ4la4= X-Google-Smtp-Source: ABdhPJyFPaF48UDn9EL0XWGWcrZP5FkZbEBsv+57nOFCNpfQPIzbjlZ8r5jqQbpU2IqHUzwMSzdz0opDUyInZWlPkhM= X-Received: by 2002:a17:90b:1e0e:: with SMTP id pg14mr11914106pjb.143.1637254607307; Thu, 18 Nov 2021 08:56:47 -0800 (PST) MIME-Version: 1.0 References: <20211116135240.3092651-1-siddhesh@sourceware.org> <87czn0cicn.fsf@oldenburg.str.redhat.com> <875ysr9nwo.fsf@oldenburg.str.redhat.com> <87wnl787vg.fsf@oldenburg.str.redhat.com> <4e9ac2de-aa3d-d9bf-c838-74e8fb59ead5@sourceware.org> <07d2bb89-93c7-54b0-dec6-7fdbd4e4998e@gotplt.org> <549f87ce-d3c1-c4ff-8aae-bc899668c730@gotplt.org> In-Reply-To: From: "H.J. Lu" Date: Thu, 18 Nov 2021 08:56:11 -0800 Message-ID: Subject: Re: [PATCH] New option --enable-pie-programs To: Siddhesh Poyarekar Cc: Adhemerval Zanella , Florian Weimer , Siddhesh Poyarekar , GNU C Library Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-3023.0 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Nov 2021 16:56:51 -0000 On Thu, Nov 18, 2021 at 8:49 AM Siddhesh Poyarekar wrote: > > On 11/18/21 22:14, H.J. Lu wrote: > > --enable-pie means --disable-pie which looks odd since PIE isn't really > > disabled, just isn't the default. But I don't feel it very strongly. As for > > Ahh then the option you suggested is actually different, in that > --enable-default-pie=no doesn't actually disable PIE for default-PIE > toolchains. That is, it is similar to the --enable-pie-programs option > I implemented with the added functionality of transparently enabling > static-pie. Have I understood that correctly? > I am not sure. --enable-default-pie and --disable-default-pie should be independent of compilers, except for static PIE. If compiler supports static PIE, --enable-default-pie implies --enable-static-pie. -- H.J.