From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dedi548.your-server.de (dedi548.your-server.de [85.10.215.148]) by sourceware.org (Postfix) with ESMTPS id B86883856940 for ; Tue, 21 Jun 2022 13:44:37 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org B86883856940 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=embedded-brains.de Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=embedded-brains.de Received: from sslproxy02.your-server.de ([78.47.166.47]) by dedi548.your-server.de with esmtpsa (TLS1.3) tls TLS_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1o3eBH-0005HG-O3; Tue, 21 Jun 2022 15:44:36 +0200 Received: from [82.100.198.138] (helo=mail.embedded-brains.de) by sslproxy02.your-server.de with esmtpsa (TLSv1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1o3eBH-000Xvn-Ub; Tue, 21 Jun 2022 15:44:35 +0200 Received: from localhost (localhost [127.0.0.1]) by mail.embedded-brains.de (Postfix) with ESMTP id 99F17480056; Tue, 21 Jun 2022 15:44:35 +0200 (CEST) Received: from mail.embedded-brains.de ([127.0.0.1]) by localhost (zimbra.eb.localhost [127.0.0.1]) (amavisd-new, port 10032) with ESMTP id tckhCPbPGrLf; Tue, 21 Jun 2022 15:44:35 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by mail.embedded-brains.de (Postfix) with ESMTP id 4B5FA480059; Tue, 21 Jun 2022 15:44:35 +0200 (CEST) X-Virus-Scanned: amavisd-new at zimbra.eb.localhost Received: from mail.embedded-brains.de ([127.0.0.1]) by localhost (zimbra.eb.localhost [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id EJVJdJPzqwGD; Tue, 21 Jun 2022 15:44:35 +0200 (CEST) Received: from [10.10.171.14] (unknown [10.10.171.14]) by mail.embedded-brains.de (Postfix) with ESMTPSA id 1B266480056; Tue, 21 Jun 2022 15:44:35 +0200 (CEST) Message-ID: <652cffb2-2f0c-8f17-258b-bec6f24ca406@embedded-brains.de> Date: Tue, 21 Jun 2022 15:44:34 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.10.0 Subject: Re: _Unwind_Resume() references in libgcc division functions Content-Language: en-US To: Jakub Jelinek Cc: GCC Development References: <0da8d95f-7102-4324-2737-82ff3c4b7e27@embedded-brains.de> From: Sebastian Huber In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable X-Authenticated-Sender: smtp-embedded@poldinet.de X-Virus-Scanned: Clear (ClamAV 0.103.6/26579/Tue Jun 21 10:15:30 2022) X-Spam-Status: No, score=-5.5 required=5.0 tests=BAYES_00, KAM_DMARC_STATUS, NICE_REPLY_A, 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 X-BeenThere: gcc@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 21 Jun 2022 13:44:40 -0000 On 21/06/2022 15:24, Jakub Jelinek wrote: > On Tue, Jun 21, 2022 at 03:13:19PM +0200, Sebastian Huber wrote: >> Hello, >> >> I noticed that several division related routines provided by libgcc su= ch as >> __divdi3, __moddi3 and __umoddi3 have references to _Unwind_Resume for= the >> sparc-rtems target. For example: >=20 > That is because: >=20 > ifeq ($(LIB2_DIVMOD_EXCEPTION_FLAGS),) > # Provide default flags for compiling divmod functions, if they haven't= been > # set already by a target-specific Makefile fragment. > LIB2_DIVMOD_EXCEPTION_FLAGS :=3D -fexceptions -fnon-call-exceptions > endif >=20 > which is there so that e.g. Ada or other -fnon-call-exceptions language= s can > have properly working divisions. Thanks for the hint. It seems also the optimization level has an impact.=20 The _Unwind_Resume dependency is only present if I use=20 CFLAGS_FOR_TARGET=3D"-O0 -g". --=20 embedded brains GmbH Herr Sebastian HUBER Dornierstr. 4 82178 Puchheim Germany email: sebastian.huber@embedded-brains.de phone: +49-89-18 94 741 - 16 fax: +49-89-18 94 741 - 08 Registergericht: Amtsgericht M=C3=BCnchen Registernummer: HRB 157899 Vertretungsberechtigte Gesch=C3=A4ftsf=C3=BChrer: Peter Rasmussen, Thomas= D=C3=B6rfler Unsere Datenschutzerkl=C3=A4rung finden Sie hier: https://embedded-brains.de/datenschutzerklaerung/