From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-ASN: AS17314 8.43.84.0/22 X-Spam-Status: No, score=-4.2 required=3.0 tests=AWL,BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,MAILING_LIST_MULTI,NICE_REPLY_A, RCVD_IN_DNSWL_HI,SPF_HELO_PASS,SPF_PASS shortcircuit=no autolearn=ham autolearn_force=no version=3.4.2 Received: from sourceware.org (server2.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by dcvr.yhbt.net (Postfix) with ESMTPS id C34F51F8C6 for ; Mon, 2 Aug 2021 20:22:23 +0000 (UTC) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 774313892026 for ; Mon, 2 Aug 2021 20:22:22 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 774313892026 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1627935742; bh=FxOh2tQVqcHhariy33he0Klutdj7Dt57/w1I0SPSr04=; h=Subject:To:References:Date:In-Reply-To:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=t6EHOkqSl+pr1m3NH0DRjf3Vf0OqdQyLjic1keLl2SJIVo3pb0M0ZGSCbyWwooWwl XNByU1R4Aaruq2FlZgK6p4W6hLHOF1t4l4OaLwty86SuYhZThQCVuSVMCRj230qV+7 TEyZIEp21yOQRoXTN0E+W+j5K5iA/xnEMTDcbNfo= Received: from mail-qk1-x731.google.com (mail-qk1-x731.google.com [IPv6:2607:f8b0:4864:20::731]) by sourceware.org (Postfix) with ESMTPS id AF99B389203D for ; Mon, 2 Aug 2021 20:20:08 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org AF99B389203D Received: by mail-qk1-x731.google.com with SMTP id t66so17914969qkb.0 for ; Mon, 02 Aug 2021 13:20:08 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=FxOh2tQVqcHhariy33he0Klutdj7Dt57/w1I0SPSr04=; b=iAojhom9/zz/xXcYQMymQmClMeLJiXSFNMN0zk+rGlDM6leb0wePEx6bHiMVt/ZAr/ 7Ul1zTZbbY/ujxYAk6kgvE/zi7lRc3eOw6bJwFMnN7DwaEdZg7wQLiNU+xhB+/7909iK yWaQexMs0LWdKc6ep/9Fy8L/OmGAzZ4/oMQQYedZUzTeno6G8FWt7RteV8lG/qDTwond QCzt0dof1mlRPfhg1J4maiRN4LowIZsQL9sHjanhlHGSNIMOO2P3WXtPGe3zaB29OEt2 ckFHPeTnur3/asPTYPEfAQGqhXbzR8giwIdi1geR/JFnmv8AoOkkIxizxW2YmZ3Nw3kn YQow== X-Gm-Message-State: AOAM531VA8hk5eLUL07co1BzPfVVOQ7bCcsZv+K+cKEAa+ts6lamSONr fEsNdxVrFUGDfP63RqOVmb7gQ5Ve2rE= X-Google-Smtp-Source: ABdhPJwHbjXaethOvgKuM1ODCGFeyRmnKMRWglr90KyRo5Hfeovp5ovsuNhj+EUCnMWT6MNjfVHdSw== X-Received: by 2002:a05:620a:2099:: with SMTP id e25mr17555392qka.448.1627935607892; Mon, 02 Aug 2021 13:20:07 -0700 (PDT) Received: from [192.168.0.41] (75-166-102-22.hlrn.qwest.net. [75.166.102.22]) by smtp.gmail.com with ESMTPSA id j4sm6392092qkk.78.2021.08.02.13.20.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 02 Aug 2021 13:20:07 -0700 (PDT) Subject: Re: Failures building glibc with mainline GCC To: Joseph Myers , Aldy Hernandez References: Message-ID: <033b535d-8adc-bb82-dff5-4e6d1d357358@gmail.com> Date: Mon, 2 Aug 2021 14:20:05 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit 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: , From: Martin Sebor via Libc-alpha Reply-To: Martin Sebor Cc: GCC Mailing List , Martin Sebor , libc-alpha@sourceware.org Errors-To: libc-alpha-bounces+e=80x24.org@sourceware.org Sender: "Libc-alpha" On 7/30/21 2:52 PM, Joseph Myers wrote: > On Fri, 30 Jul 2021, Aldy Hernandez via Gcc wrote: > >> There's a new jump threader in GCC which is much more aggressive, and >> may trigger latent problems with other warning passes, especially >> -Warray-bounds, -Woverflow, and -Wuninitialized. >> >> Do your problems go away if you take out commit 2e96b5f14e? > > Reverting that commit fixes all the glibc build failures except for > x86_64-linux-gnu, i686-gnu and powerpc64le-linux-gnu. > I just built Glibc for x86_64-linux-gnu with the top of trunk and got no unexpected warnings. Can you please share the translation units for the files with the warnings? (Or just open GCC bugs for them if you believe they're false positives.) Thanks Martin