From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-1.mimecast.com (us-smtp-delivery-1.mimecast.com [205.139.110.120]) by sourceware.org (Postfix) with ESMTP id 29F423857807 for ; Tue, 25 Aug 2020 12:46:59 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 29F423857807 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-254-gG_QjmBqPK2VGB6__8bqBQ-1; Tue, 25 Aug 2020 08:46:55 -0400 X-MC-Unique: gG_QjmBqPK2VGB6__8bqBQ-1 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id D949F10ABDAD; Tue, 25 Aug 2020 12:46:54 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-112-37.ams2.redhat.com [10.36.112.37]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 3771A7C682; Tue, 25 Aug 2020 12:46:54 +0000 (UTC) From: Florian Weimer To: "Y.D. via Libc-help" Subject: Re: Add a new function to dlfcn.h? References: <87y2meiw6g.fsf@mid.deneb.enyo.de> Date: Tue, 25 Aug 2020 14:46:52 +0200 In-Reply-To: (Y. D. via Libc-help's message of "Mon, 17 Aug 2020 10:15:28 +0800") Message-ID: <87lfi27v0j.fsf@oldenburg2.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Mimecast-Spam-Score: 0.001 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-7.3 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, 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-help@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-help mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 25 Aug 2020 12:47:00 -0000 * Y. D. via Libc-help: > Now I've created a new file called dl-usage.c under elf/. And I've added > dl-usage to routines in Makefile under elf/, just in case, I've added it to > dl-routines, too. One of my in-flight patches already uses elf/dl-usage.c, so you might want to use something else: > But when I create a new file, including dlfcn.h and refer to the function, > the error message is "undefined reference to `dlusage' collect2: error: ld > returned 1 exit status". You need to add it to elf/Versions under a new GLIBC_2.33 section, otherwise the linker will treat it as a hidden symbol. Thanks, Florian