From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf1-x12b.google.com (mail-lf1-x12b.google.com [IPv6:2a00:1450:4864:20::12b]) by sourceware.org (Postfix) with ESMTPS id 9672C3858429 for ; Wed, 13 Dec 2023 09:05:10 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 9672C3858429 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 9672C3858429 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=2a00:1450:4864:20::12b ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1702458321; cv=none; b=TfYPrxmH09Kn1f2bEl49h9SypXAfvvZb2aS6qFmDzd1US+Y97sTRhsG//XkGQFHU3QMgbqX/PIdUpgrP7O/89GH+JdP9s4R6gOdgi/uWbJV+F22BNqOsNMArB0j6BDSL5QO8jEUCT4ChQHANCetEXuDE79wrj2xPAz9JFmeKgGM= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1702458321; c=relaxed/simple; bh=hxA5+8yLe69bOcdp5Az7SGWlce9QQykdv7nUzKar6/c=; h=DKIM-Signature:MIME-Version:From:Date:Message-ID:Subject:To; b=K7xkrAPJp5uOm+F+UWoyg3DQvSsf4X1sbtGXsB1P4uyMsmg3NO0DiJ7Ht8hQO2AHP0+yn9XoIrotbUKtpscBskFVtDs8aixSdSZZbEeoOKWm92Hk/zQMQuS1cSUOskCoG6Yy/UtjmYX5OoTFBrwAVmtJhRZ02BF8+PWodIoXcDo= ARC-Authentication-Results: i=1; server2.sourceware.org Received: by mail-lf1-x12b.google.com with SMTP id 2adb3069b0e04-50bf3efe2cbso7630474e87.2 for ; Wed, 13 Dec 2023 01:05:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1702458309; x=1703063109; darn=gcc.gnu.org; h=to:subject:message-id:date:from:mime-version:from:to:cc:subject :date:message-id:reply-to; bh=nFC1q+kOzFflVKuLqhWRYYN6b3f8X76WBCVDNurLw+Q=; b=X20jxrw8TbTmGkvdRFgZk/p9CL9t2ULg9/5SimHPuc2bKUEaYAwlAmYnPUa3oxgzu5 t2wud6SGIY+U4rN2IK3I/Z/z355GMomcT7/urYk+UHB4wN7LdUB8dvAE/9kRj8T1O8zK epADu7kqQXYtxVMUEK48ujAOnS2kA0edsJwW9A2IbOqlRjzT+SGjbE+sv5qlL0Ja84zT OqP7CnX2M6ugJXKYoreqN95vkzMXfahTPptJK7oEJKmNWESomh0IgdZqc+HwhJVRajbI ExOFcKlXEefuSdmM/Yzr4IJk7T93PB1CAbwmUg33+oyPA3smJTCSibkv0jPNweGU8bz0 IHuw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702458309; x=1703063109; h=to:subject:message-id:date:from:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=nFC1q+kOzFflVKuLqhWRYYN6b3f8X76WBCVDNurLw+Q=; b=deal/Ejtuaze/VqIUPBHAnxr+rM3Nid+bH7Cz4iipMWuGfz8TWkH9FJOrrFGiD/1DD 8GeP63ue1ZNy8uECpp2iuv9Q24NvCeTZKsssj3T9MIdZyZCt3mSO9yaGdd9NuWfumXK0 XFnYDGMTa+JI6oYZuTLX9vt3ys9NqqcU9nlno+triDVZbTbtcw8UQw8LSPtlaVViOZ6h Ixq8ORgtrGQ71dyTuk47bnRWKKyj50esgMPOMzd2CTYv8lD1haF0oqBIh7hpfaxkILrI 5d4Kuuqzb4RSdlUAeLaCkDRV6FZs8gPphU4YyJJczeR/eoUlVkogfY4J7TpcN3LP4Iwf QMTw== X-Gm-Message-State: AOJu0YyI5kK4RFkV3graiO9JfdvY5yxQIhwXKGaY4xKxL8ngG7Ty/bkC qgiGE4wFzuwquSDLWZFhsntZNUXHW9HvPLzwMxIP7AMv6hs= X-Google-Smtp-Source: AGHT+IHzxy+9J/8NzyhTBZ269Wo0yMCEWcxFojH0FdTe+vV7Fyf7P7v/7w2baL2qTU8By9vZ2HdhDXMRJHu/2VSa4+Q= X-Received: by 2002:a05:6512:1188:b0:50b:ffb9:1114 with SMTP id g8-20020a056512118800b0050bffb91114mr2187733lfr.161.1702458308454; Wed, 13 Dec 2023 01:05:08 -0800 (PST) MIME-Version: 1.0 From: Hanke Zhang Date: Wed, 13 Dec 2023 17:04:57 +0800 Message-ID: Subject: Question about creating global varaiable during IPA PASS. To: gcc@gcc.gnu.org Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=0.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_ENVFROM_END_DIGIT,FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE 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: Hi, I'm trying to create a global variable in my own PASS which located at the LATE_IPA_PASSES. (I'm using GCC 10.3.0.) And after creating it, I added the attributes like the following. // 1. create the var tree new_name = get_identifier (xx); tree new_type = build_pointer_type (xx); tree new_var = build_decl (UNKNOWN_LOCATION, VAR_DECL, new_name, new_type); add_attributes (new_var); static void add_attributes (tree var) { DECL_ARTIFICIAL (var) = 1; DECL_EXTERNAL (var) = 0; TREE_STATIC (var) = 1; TREE_PUBLIC (var) = 1; TREE_USED (var) = 1; DECL_CONTEXT (var) = NULL_TREE; TREE_THIS_VOLATILE (var) = 0; TREE_ADDRESSABLE (var) = 0; TREE_READONLY (var) = 0; if (is_global_var (var)) set_decl_tls_model (var, TLS_MODEL_NONE); } But when I try to compile some example files with -flto, error occurs. /usr/bin/ld: xxx.ltrans0.ltrans.o: in function `xxx': xxx.c: undefined reference to `glob_var' xxx.c: undefined reference to `glob_var' xxx.c: undefined reference to `glob_var' Here `glob_var' is the global varaiable created in my PASS. I would like to ask, am I using some attributes incorrectly? Thanks Hanke Zhang