From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr1-x42f.google.com (mail-wr1-x42f.google.com [IPv6:2a00:1450:4864:20::42f]) by sourceware.org (Postfix) with ESMTPS id 861773858D1E for ; Sun, 12 Feb 2023 11:20:23 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 861773858D1E Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=jguk.org Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=jguk.org Received: by mail-wr1-x42f.google.com with SMTP id j23so9610777wra.0 for ; Sun, 12 Feb 2023 03:20:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=jguk.org; s=google; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=qpj59ujE3WTzyIALfQwWgQJYIVWeLcyhsk81hUBLzu4=; b=MlS5HKPq8zevaZckzc7AlOZoZVJ2ylB84XX802F6u6n1MEHETmX4ZsuVp9wlJlfUYk VbMxe+qnsRlMAKfIrmL6rQumSC8Edu1Cm7oBC4OqfD5VIpTlD5o7UH9r2+PNqL/VYLP0 mubEuMtyq5JCEC3REwYa8tHFSGVxFNVnNHxp9usA+EA451zGvHBB8WkDYxr/HOJWmwMM T1lJnmYVP2ARXLJzAqt542FW2iWNOJHC8xKTmK5B8p2Ycn7fRzEgIpgFetTCX+0G2hTP +I4JzVr1ciFJXkdXgYK5l88fKgczGTxftM6wIY03YP9BXiRjgoyKNtkoqhrSxAvgNxmD tqhg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=qpj59ujE3WTzyIALfQwWgQJYIVWeLcyhsk81hUBLzu4=; b=ZIEj99h7SujeVrdt05xv9DwDT7B5wzN1VUc3jFISsR6Un9gxWhv5Pw5OyKarB7D73J 4oi4zQCTaLoyl5Bto88sJK4+hGc3vhw0u9dux3anMlPju6sNk5ZZmbo8QHF7rFpOHWeF zwcR98TTH589FrEpeAeXPxA2YWb46mNFUc/+2vcgjVGeoOlL0uwPfRJCTRf0j6UXwP0Y ZjjopZP/5jyie83+heqghOjKBcDT3p9xf8YSm8X/cw5A0/ERAkov+tpnv/28jJoXW8PZ Cr+B/IC2hr2oPBWn0Xvj8oyYH/Fg6EYK8H2D5l+KGRFtsgrU37E8vyTJqoCtaOqIPVxW GavA== X-Gm-Message-State: AO0yUKUK15hgOsRQSXYHXOl/8LpVYw69OwgMbhdibUsY2VrDTKdwT6Gq VOkDikHjIMcP4f/m0s0Pj65JQg== X-Google-Smtp-Source: AK7set96apx0/gCiR+/R4T5HHeRCTlf776HAQNcEpoeJVXSA3iDh3oC+dGLSTOn6qAUF/Qf9/2wobQ== X-Received: by 2002:a05:6000:1d2:b0:2bf:b661:87d9 with SMTP id t18-20020a05600001d200b002bfb66187d9mr17707269wrx.50.1676200822276; Sun, 12 Feb 2023 03:20:22 -0800 (PST) Received: from [192.168.0.12] (cpc87345-slou4-2-0-cust172.17-4.cable.virginm.net. [81.101.252.173]) by smtp.gmail.com with ESMTPSA id v15-20020adfebcf000000b002c3f81c51b6sm8039973wrn.90.2023.02.12.03.20.21 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 12 Feb 2023 03:20:21 -0800 (PST) Message-ID: <9060022e-5e3b-e85f-b9e4-9b7beb265550@jguk.org> Date: Sun, 12 Feb 2023 11:20:21 +0000 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.7.1 Subject: Re: build error --std=c++17 vs --std=c++23 -Wrestrict "may overlap up to 9223372036854775813 bytes at offset -3" Content-Language: en-GB To: Jonathan Wakely Cc: gcc-help References: <681c1224-aec4-9831-26b1-e11fd182dd5c@jguk.org> From: Jonny Grant In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-3.6 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,NICE_REPLY_A,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 12/02/2023 01:33, Jonathan Wakely wrote: > > > On Sat, 11 Feb 2023, 23:38 Jonny Grant, > wrote: > > Hello > > Anyone else seeing an issue when using c++23 ? > gcc (Ubuntu 12.2.0-3ubuntu1) 12.2.0 > > The only change is to use --std=c++23 > > > With C++17 std::string is instantiated in the library, not in your code. With C++20 your code instantiates it. That's the only reason the -std option matters here. Ok I see.