From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by sourceware.org (Postfix) with ESMTPS id 09D0D384AB48 for ; Fri, 19 Apr 2024 00:38:15 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 09D0D384AB48 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=gmail.com ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 09D0D384AB48 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=2607:f8b0:4864:20::62c ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1713487096; cv=none; b=fYuVjOIADrjgTHBcHB2GB415ci/M9gA7boYYnbqeWZo+4VA8OZXQsCsxKtcbnI/0lvpGr6zatkORnsmKrwHdvhNYiLLEvi2J0siW3qRKB6mPsFwBXOP6AecXE2kutOE5uxg4KwKkIB4Mu5Qg+/rEJk1StYP9VlkxMtLHIiQVYnU= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1713487096; c=relaxed/simple; bh=i8xsxb6wWviIWZBAuztaMuIXaHGg4ULnqXjg7qdyqdM=; h=DKIM-Signature:Date:From:To:Subject:Message-ID:MIME-Version; b=bSarsjxXKCgTGS2Zjw3L8WUoyfSfSAJvHBaAfh3XdFrUAAlXIIyM7Yu6gYmTNkwx7g17eeFdk70hVhbhpMgqPR/gDlX4P4VOhBedz1mK2cwMKHUWCWjGRFMP9W+dYHR5fzvkL03d7IzkhF2ZPN4YujbGHDCU9xBxWc2GIj7LYuk= ARC-Authentication-Results: i=1; server2.sourceware.org Received: by mail-pl1-x62c.google.com with SMTP id d9443c01a7336-1e5b6e8f662so12854675ad.0 for ; Thu, 18 Apr 2024 17:38:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1713487094; x=1714091894; darn=sourceware.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=6kvK9gWYEZPODIh3cFeDVzZw3mw47rDK+Vl1nqXERqs=; b=mJVYp93IbzT+LagrWc61UOnhTBiK18LJcNvod8xgVlmVSTDXbpgVHRIPFwMsLGYkz8 Q8SBvAYjDBsHCBeRYrw3MwLfWEyvZGddnsN45XgR+IEML/sBS9lXWmGSeck9Ha8n8e/M GHrWjSvDQemmmGvOF63CwsnLYPjq0m7ldA2iX8tA3mthUT/wzj0UJbD8oIrEigUb85wf t/ICqicbfCQxp2hMtMN2KI6V6Z0/gfu7gHS5TG5tV8qjOaKZ3fQcaeDxQwZ8uKAj7r+d L1jfbmVdbzPT9WNri1Ai4ctXu/GeiPsY+9KaHKP5yczdGYUC9PMBmf3B0aGOdL7Ra728 RjXA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1713487094; x=1714091894; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=6kvK9gWYEZPODIh3cFeDVzZw3mw47rDK+Vl1nqXERqs=; b=u8dSjSzED/buG5O1GyGiLE0r2L/8HEoAFJbvM5gtVIIAssd4peiFXmv6cv/u971dY6 y4x2Tp3kR+jikJV6EsHO1WLn3QoNhK4NLYwmo/aYmr9PmO4JTd+zc97Fw715fU+sQbf7 KEI81FY6YEjUlH20EkSp9f/xOQyJtPaVmQ0UKpY2NeQxU2+TqSfSOlL35B4QKWPd61LD b5+JOUfy3jaddKtDyAIGPmbOT06ip5PdDpIeoWQ1xIzNbdo8IxN/P67ZWUr42N0kXJVj /c0zN7yQj4l7JWM9Oz0tkmhecH6XQ/PZJ5Kl5jy+CeZhA0/rP9buziZ5+JDJ5gE76wxw Ny2w== X-Gm-Message-State: AOJu0YzeMn4FrhpmsXCHxbSX1AFU99WpICdTRJmf7QFEyOMLlieZEMt6 IaNhFMDBKUFpYfrHSK8plDINZk0Zhwq5sUveXBS41a4oe4S5ON+9ZUJKVw== X-Google-Smtp-Source: AGHT+IFM+ta+QvKRf0VRu89wIOLahJJyRGpGV8LukPcWVGzqWFmw/sbJgSVWe/SsDWwqshPafKJWzQ== X-Received: by 2002:a17:902:e889:b0:1e5:3684:617e with SMTP id w9-20020a170902e88900b001e53684617emr893954plg.52.1713487093788; Thu, 18 Apr 2024 17:38:13 -0700 (PDT) Received: from squeak.grove.modra.org ([2406:3400:51d:8cc0:2141:f431:e4de:a0ac]) by smtp.gmail.com with ESMTPSA id m9-20020a170902db0900b001e2a43bafbasm2129756plx.216.2024.04.18.17.38.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Apr 2024 17:38:13 -0700 (PDT) Received: by squeak.grove.modra.org (Postfix, from userid 1000) id 6555E1140235; Fri, 19 Apr 2024 10:08:11 +0930 (ACST) Date: Fri, 19 Apr 2024 10:08:11 +0930 From: Alan Modra To: "H.J. Lu" Cc: binutils@sourceware.org, oliva@gnu.org Subject: Re: [PATCH] elf: Strip unreferenced weak undefined symbols Message-ID: References: <20240418122856.190234-1-hjl.tools@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240418122856.190234-1-hjl.tools@gmail.com> X-Spam-Status: No, score=-3025.7 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=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On Thu, Apr 18, 2024 at 05:28:56AM -0700, H.J. Lu wrote: > Linker will resolve an undefined symbol only if it is referenced by > relocation. Unreferenced weak undefined symbols serve no purpose. > Weak undefined symbols appear in the dynamic symbol table only when they > are referenced by dynamic relocation. Mark symbols with relocation and > strip undefined weak symbols if they don't have relocation and aren't > in the dynamic symbol table. OK, seems reasonable. -- Alan Modra Australia Development Lab, IBM