From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTP id CDD6D385EC54 for ; Thu, 20 May 2021 15:13:21 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org CDD6D385EC54 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-486-wYEHL3YbPpaynCPV4SyDLQ-1; Thu, 20 May 2021 11:13:17 -0400 X-MC-Unique: wYEHL3YbPpaynCPV4SyDLQ-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id D8B0279EE4; Thu, 20 May 2021 15:13:16 +0000 (UTC) Received: from oldenburg.str.redhat.com (ovpn-112-137.ams2.redhat.com [10.36.112.137]) by smtp.corp.redhat.com (Postfix) with ESMTPS id CDBDD781E0; Thu, 20 May 2021 15:13:15 +0000 (UTC) From: Florian Weimer To: "H.J. Lu" Cc: Andreas Schwab , Florian Weimer via Libc-alpha Subject: Re: [PATCH 00/10] nptl: Complete libpthread removal References: <87eee4ccpd.fsf@igel.home> <87v97g5bi9.fsf@oldenburg.str.redhat.com> <87a6oscbc0.fsf@igel.home> <87r1i459cb.fsf@oldenburg.str.redhat.com> <875yzgc8hi.fsf@igel.home> <87mtss57go.fsf@oldenburg.str.redhat.com> <871ra4c7kf.fsf@igel.home> <878s49pmbg.fsf@oldenburg.str.redhat.com> <87im3dwm2s.fsf@igel.home> <871ra1pl2v.fsf@oldenburg.str.redhat.com> Date: Thu, 20 May 2021 17:13:13 +0200 In-Reply-To: (H. J. Lu's message of "Thu, 20 May 2021 08:09:59 -0700") Message-ID: <87pmxlmoae.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-6.7 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H4, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) 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, 20 May 2021 15:13:23 -0000 * H. J. Lu: > On Thu, May 20, 2021 at 8:06 AM Florian Weimer via Libc-alpha > wrote: >> >> * Andreas Schwab: >> >> > On Mai 20 2021, Florian Weimer wrote: >> > >> >> That is, keep libpthread.so.0 around indefinitely (with the >> >> placeholder symbols and symbol versions), and just wait until more and >> >> more binaries are linked with the empty libpthread.a and no longer >> >> have a DT_NEEDED dependency on libpthread.so.0? >> > >> > I don't see any downsides with this approach. >> >> There's a slight additional run-time overhead due to the loaded object. >> But I don't feel strongly about this. >> >> Do you think it's okay if we ship libpthread.a only, or should we >> install a no-op libpthread.so as well? -lpthread will use the .a file >> for static and dynamic links, so I think that's sufficient. > > Can we ship a dummy linker script for libpthread.so to just > satisfy -lpthread at link-time? An empty libpthread.a already does that. Thanks, Florian