From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from esa2.mentor.iphmx.com (esa2.mentor.iphmx.com [68.232.141.98]) by sourceware.org (Postfix) with ESMTPS id 943163858409; Mon, 7 Nov 2022 16:11:13 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 943163858409 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=codesourcery.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=mentor.com X-IronPort-AV: E=Sophos;i="5.96,145,1665475200"; d="scan'208";a="86455303" Received: from orw-gwy-02-in.mentorg.com ([192.94.38.167]) by esa2.mentor.iphmx.com with ESMTP; 07 Nov 2022 08:11:12 -0800 IronPort-SDR: u5XPyM6I5SQMhvewZ7N1YR7LNcmevDyjpHHxdWfkqZ3lKK/uHsY9+nMY6Zm6Ud2IBvgnV8+Tng sau7F5EOeRk6owDg1PMrmGEhqcmeXJuZ0XsNk11vngSYzQDxVmSOjRZ4frrC1XgercsdlhTh0+ 9aefhEp25RB69p17jGkAvVo5CGEZ1ahdVODk4pKNcKyy0EmfATdCw/0ZGxBrP4/C9r4wIb0mbP fDGRbEkYc7R0DMQcdAoXq+r0AT2KP8NuYD/d6jjhb058DD6aym6wn8Ngfs/XQyDRLP4AhJeLgR uZ0= Date: Mon, 7 Nov 2022 16:11:06 +0000 From: Joseph Myers To: Jakub Jelinek CC: Jonathan Wakely , Patrick Palka , , Subject: Re: [PATCH] libstdc++: Add _Float128 to_chars/from_chars support for x86, ia64 and ppc64le with glibc In-Reply-To: Message-ID: <6cffcff-f879-c122-2aeb-fa53714511ac@codesourcery.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" X-Originating-IP: [137.202.0.90] X-ClientProxiedBy: svr-ies-mbx-14.mgc.mentorg.com (139.181.222.14) To svr-ies-mbx-10.mgc.mentorg.com (139.181.222.10) X-Spam-Status: No, score=-3110.2 required=5.0 tests=BAYES_00,HEADER_FROM_DIFFERENT_DOMAINS,KAM_DMARC_STATUS,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS,TXREP autolearn=no 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 Wed, 2 Nov 2022, Jakub Jelinek via Gcc-patches wrote: > APIs. So that one can build gcc against older glibc and then compile > user programs on newer glibc, the patch uses weak references unless > gcc is compiled against glibc 2.26+. strfromf128 unfortunately can't This support for older glibc doesn't actually seem to be working, on an older system with glibc 2.19 I'm seeing /scratch/jmyers/fsf/gcc-mainline/libstdc++-v3/src/c++17/floating_to_chars.cc:52:3: error: expected initializer before '__asm' 52 | __asm ("strfromf128"); | ^~~~~ and a series of subsequent errors. -- Joseph S. Myers joseph@codesourcery.com