From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by sourceware.org (Postfix) with ESMTPS id A8C573858D37 for ; Thu, 3 Feb 2022 06:23:48 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org A8C573858D37 Received: from pps.filterd (m0246632.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.16.1.2/8.16.1.2) with SMTP id 2131YJWG013006; Thu, 3 Feb 2022 06:23:47 GMT Received: from aserp3030.oracle.com (aserp3030.oracle.com [141.146.126.71]) by mx0b-00069f02.pphosted.com with ESMTP id 3dxj9g09xy-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 03 Feb 2022 06:23:47 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.1.2/8.16.1.2) with SMTP id 2136Jofk096241; Thu, 3 Feb 2022 06:23:46 GMT Received: from nam12-mw2-obe.outbound.protection.outlook.com (mail-mw2nam12lp2048.outbound.protection.outlook.com [104.47.66.48]) by aserp3030.oracle.com with ESMTP id 3dvumjt64d-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 03 Feb 2022 06:23:46 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=aHvvJ0nutTl16eVaaQtH7pmmQzfRhOul9J8GZZG4lplAAVTX0/GBrEWLgVRZ+tknN0Bg8hN0NgLiDK94sVmJGve2PaZ8H5RAME/BzDeKUBZbpgt9ca1Fo7MU4dADvLyyc/A6vKrhD41GJK+P2UE9TQPgin4MqMmJJ6YKBMgYV21q+kajM2K97KVl2bQKn9hHMxndWhmf441+gcSJE1CQJ9askszUYsykOYjt0np/th1yZwcO4li/wovrJuobUIwfd7Rewy0p2fPjJyfonXRNMDFricV6YDOHONImv16kZwiPGV1+N+PsAscrD2PeZX6pk4mJoOFDT4evqrJ7XH/nCA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=ABMMhYWTd6Yk16yOAIwPXLeaELV38uEvmp/4WNN6s3M=; b=Gn92gMlT4s9IvbYLKkVQWp5wukto47z3UciH9VM2wCkhw0yk5IaugESVO2VqzmTbji6IM3ERF8Wq+v7BulRKULS9UDSxP/d04foOADOo8iwDdgU9fOusiMu8bsNLES6bSEczm0SgFZVY4CYh+ZEB19YHg/moVNd/IyRS7/XmqLV/Hl+QyZukyEuuMvW1K3XWHhNanKpdUfJFr1Ip9jzLGmNklIAfTPqz0Uoqf0xzGBa6z9ZnuQo/Y1LPtCscooNqWf8PiMWhBXR73iIUVNPO4ebjDDzgYBixayWMo8R/O8RMabF/V6+ha3Si3eFAple9LuRlX+N1lJ7PPERaE8YZkQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=none; dmarc=none; dkim=none; arc=none Received: from SA2PR10MB4636.namprd10.prod.outlook.com (2603:10b6:806:11e::10) by SJ0PR10MB5519.namprd10.prod.outlook.com (2603:10b6:a03:3fa::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4951.12; Thu, 3 Feb 2022 06:23:44 +0000 Received: from SA2PR10MB4636.namprd10.prod.outlook.com ([fe80::3964:c14a:cb6b:a59b]) by SA2PR10MB4636.namprd10.prod.outlook.com ([fe80::3964:c14a:cb6b:a59b%3]) with mapi id 15.20.4951.012; Thu, 3 Feb 2022 06:23:44 +0000 Message-ID: <1397fd59-7142-fc73-80f0-9893f7b07f33@oracle.com> Date: Wed, 2 Feb 2022 22:23:41 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.5.0 Subject: Re: [PATCH V4] gprofng: a new GNU profiler Content-Language: en-US To: "Jose E. Marchesi" , "Maciej W. Rozycki" Cc: Vladimir Mezentsev via Binutils References: <7dadb881-ab4b-de4a-0453-6d8661a8cd83@oracle.com> <44e0ca3c-0792-7fc2-bff4-0918f1f4bea2@redhat.com> <653282db-9261-e5fc-4280-0d00be272d81@oracle.com> <53d65dfe-38b4-7a2c-2052-b3c039642392@redhat.com> <3d87cce5-1ac6-ca35-0baa-576d599acdc7@redhat.com> <1c976060-3d2f-1050-f948-9448acb33c71@oracle.com> <87fsp9jli4.fsf@oracle.com> <877dadw7r7.fsf@oracle.com> From: Vladimir Mezentsev In-Reply-To: <877dadw7r7.fsf@oracle.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: SA9PR10CA0017.namprd10.prod.outlook.com (2603:10b6:806:a7::22) To SA2PR10MB4636.namprd10.prod.outlook.com (2603:10b6:806:11e::10) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 1f725a0c-f1b9-4469-023c-08d9e6ddba97 X-MS-TrafficTypeDiagnostic: SJ0PR10MB5519:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:10000; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Marchesi via Binutils wrote: >> On Thu, 27 Jan 2022, Jose E. Marchesi via Binutils wrote: >> >>>> It looks like you configured build  without --enable-shared. >>>> If yes, this is expected. >>> Woudn't it be better to skip building gprofng in case no --enable-shared >>> is specified at `configure' time? >> Is it actually necessary to require `--enable-shared' in the first place >> for the program to work? > I think so. AFAIK the gprofng collector works as an interposed shared > object. yes. We use the gprofng library in LD_PRELOAD. This library should be a shared library. I am trying to set  extra_configure_flags='--enable-shared' for gprofng build only. But gprofng depens on libopcodes and this library should build with -fPIC. I haven't yet found how to solve this build issue. -Vladimir > >> The thing is there is (otherwise) little point in using the option with >> binutils, given that both libbfd and libopcodes are internal libraries not >> for general use and neither provides a stable ABI, so every revision would >> have to be separately installed if any external programs were to use them. >> >> Therefore having these libraries built as DSOs causes all the drawbacks >> of dynamic loading while no advantages of same are virtually used, and >> consequently I believe hardly anyone uses such a configuration. > There is also libctf, which is used by the linker but also intended for > external usage. > > RHEL, for example, builds native binutils with --enable-shared, then > excludes both libbfd.so and libopcodes.so from being installed: > > %if %{enable_shared} > %{_libdir}/lib*.so > %{_libdir}/libctf* > %exclude %{_libdir}/libbfd.so > %exclude %{_libdir}/libopcodes.so > %endif >