From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from NAM11-DM6-obe.outbound.protection.outlook.com (mail-dm6nam11on2069.outbound.protection.outlook.com [40.107.223.69]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id BC4581649C8 for ; Mon, 27 May 2024 21:01:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.223.69 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716843679; cv=fail; b=Tp5r6oW6fz//naD7HqV77A8mEGhuK/4d4VWXSQHdaGvVbKR2Jb10tr+AZjMrxiJw4fYfSDkW1fNa5/knf2UyhxYRLDKjD4rDxp/nDAcMOeDWU+POd3fvFhhbuGG6BwxiilcsQ4/2wAUwJokuUNU5yFAHtG6z1RwwT0IUVFG/69A= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716843679; c=relaxed/simple; bh=9vXO2O8P65102jHpZCmvZbsXezd5ETiqc9DbI3IYg7g=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=U4TEb8oPc05kRaL1AT2oU2hJ1eY1yUSis+26CYvgKUsjQDhiUxqY5LTdQeLgMnForxuq/weE6Jx/fqHSqfe4sIuZrl3Iyvm3NYJVttrmXy3+lGLYJenM5q5NamkK+P7SxfYNKDWOjmKS2SAwZivkWdpdaSujigLoqHPBdKxdGU8= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com; spf=fail smtp.mailfrom=nvidia.com; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b=YSEAxdJg; arc=fail smtp.client-ip=40.107.223.69 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=nvidia.com Authentication-Results: smtp.subspace.kernel.org; spf=fail smtp.mailfrom=nvidia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=Nvidia.com header.i=@Nvidia.com header.b="YSEAxdJg" ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=LIDevDuOA5mVzsrA1HwPAo1VCS1cHTEzlmWWLYSrJdXDegnjKjvxwD93gVjKVMy72nJJ3MVj4WDjEeLmPGH14qJ1Ov8mQM5LfQBO7JvRP/ZqIh4nfX8IyLNnTUw1/6iRAGzGQp+CvOsMGTQtt3X2Fc1IQV4ergjxAJjLafPQNflFNYPgu/gaia74cmzD39XZZfqP/oLWs0iB3KXDB0HLZoX6fka+d+xG1rZ+sVnHlF+UlgrNyBr9eav4nCLYoraOQC+U6zEAFBzaTf4tHyj4p67Ane3MtdxAut7wdRx4UQYvUdkT8TT3ZT/rQbfhhxoFa1QVe9hlae/3+5/mLcx1Cw== 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=OXxd3UDPrLIFQ0NXN7YcDKcV4htYWKypH3EpeO9mfUo=; b=GobRWtFqWeF9xLtZCcrp3uuTZTC0GKtgybTFxxWG3FC8mcScKgwQtmKnb0YW6guQOHcZpXApWOMNNt9CjtAL7UuegR6pbXU5NTo5RiUBZIs5wCPg7yLLW6wosTTzgl0prMoWmIxx0y7TWZtRSPDAssrbtqbqY674BK2GGAiKh1so1YASVME8/5K20vSEcZJZPA9FQnbLBA+3iqDVEj9el1iNxxY/ssnNPUt4AzyBQiDQAGsn9cekZBr9Z0/lcV2ArRgJAa2dVFFsOH/20LVcod51O69senrLoJwPHxUkphx1QwTFqLAj7idERGrKKlBFMcJZfqXIvdYi3NJgkUMmVw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=nvidia.com; dmarc=pass action=none header.from=nvidia.com; dkim=pass header.d=nvidia.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=Nvidia.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=OXxd3UDPrLIFQ0NXN7YcDKcV4htYWKypH3EpeO9mfUo=; b=YSEAxdJgvigIY42RzTKZO06oNsBnfpCSpchMAuj8gkmHMDpSj1EmNzmSit4G98DXvZwLJFyxHIbXHKhTRD3YXnggzWdrSPq2fgNySkKMFHG5iY6XvJXRWmgEYbn9MsoEAPip7265MFPUvTOqmdXXHFQ/78dZjBd8zcywW0c+++E+2uIhOVsFgzeouDG3akx1jXDaZEEqN+WXS47/MORKMaMBUVzWKUnYI9VImKxWX6olra31XxeT6dI09sSYPCLtqZlFGOZj1v8WdwS/7FrBDkSXsjgg2BUCnQBczKOhazYwuTRp+Z6ugvB/Ve4VBIJjUOkrxOeIVfLBoYwjHOwctg== Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=nvidia.com; Received: from BY5PR12MB4130.namprd12.prod.outlook.com (2603:10b6:a03:20b::16) by BL3PR12MB6620.namprd12.prod.outlook.com (2603:10b6:208:38f::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.7611.29; Mon, 27 May 2024 21:01:08 +0000 Received: from BY5PR12MB4130.namprd12.prod.outlook.com ([fe80::2cf4:5198:354a:cd07]) by BY5PR12MB4130.namprd12.prod.outlook.com ([fe80::2cf4:5198:354a:cd07%4]) with mapi id 15.20.7611.030; Mon, 27 May 2024 21:01:08 +0000 From: John Hubbard To: Shuah Khan Cc: angquan yu , "Kirill A . Shutemov" , Ingo Molnar , Binbin Wu , Alexey Dobriyan , Rick Edgecombe , Sohil Mehta , Yu-cheng Yu , Dave Hansen , Valentin Obst , linux-kselftest@vger.kernel.org, LKML , llvm@lists.linux.dev, x86@kernel.org, John Hubbard Subject: [PATCH v2 4/6] selftests/x86: avoid -no-pie warnings from clang during compilation Date: Mon, 27 May 2024 14:00:40 -0700 Message-ID: <20240527210042.220315-5-jhubbard@nvidia.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240527210042.220315-1-jhubbard@nvidia.com> References: <20240527210042.220315-1-jhubbard@nvidia.com> X-NVConfidentiality: public Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: BYAPR04CA0025.namprd04.prod.outlook.com (2603:10b6:a03:40::38) To BY5PR12MB4130.namprd12.prod.outlook.com (2603:10b6:a03:20b::16) Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BY5PR12MB4130:EE_|BL3PR12MB6620:EE_ X-MS-Office365-Filtering-Correlation-Id: c1af2471-084f-4c0b-e9ba-08dc7e9021b0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230031|1800799015|7416005|366007|376005; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?FDGz9Y83OqvgDW+he47fX/GhgZ4UbiOdWVnWApPI0EC+rivj43JyhH9Jy0y2?= =?us-ascii?Q?grr7HLOEdlZlG2GLY6BU/G8Zi8pV6GiL4cyaZG9ElT9wGA3kRr6gvoFvANn+?= =?us-ascii?Q?SRat2HTcZAMCrp2sc9k46sn27dLlsbAVSAcLQsvBHYRQGbQqGZVJ3bVrYCds?= =?us-ascii?Q?S9cR8F7W0dDLelsm/F+jCOi7e19YZU/YtbykKLWHPNAWgIrCUq2I18snP0gm?= =?us-ascii?Q?6xPd47uktjVoTs+mKKmpCzmQUg54IeMOMOJ3ZHF7sx0Dv4nWGnSC4rIXXiFN?= =?us-ascii?Q?EuyOPVQfPHoMfMR7YvxaM2DxOUje3Ejv3dX2WqZmOnH65rZfqgiqSK6/qfCC?= =?us-ascii?Q?HIhaliGczyQMVOWvkLkFlo5o1tJxgfQu2n0eJ4r/aHP/j1rACKGJTUkvJLxf?= =?us-ascii?Q?IHyeZsEGh86rWuyl5hSJSt7+ir+9JGCI8PYY5C275nRTdQGRUv0Rns3tu8Wv?= =?us-ascii?Q?0LNQOX0Ej8gv6izrS3q1D+xDhf1mMoeYl9baOB26k7VHy5TbQbTmvLaEwqI/?= =?us-ascii?Q?r3CVnNs9js1GlzArrwGJt5GLe8MtWobqGsRRfMq5eMVFTG+1clWixiUu5j5i?= =?us-ascii?Q?tH32C63GrvmrgN9MEL872X6Jo/MbaQkKiHxaxJ+LssZCFu5opBZsATumZ+9i?= =?us-ascii?Q?mJhPXb55FkaJgWfjzWMeUgeMHtAKeK8B5QvRQhSzWbLQOMFNq4PkkP9zxzTB?= =?us-ascii?Q?ebUbpfgi8rcHz7hWy9KhrhAZKHdoxWIylmVmjoF6eJum58WBC8EuOY9GFReb?= =?us-ascii?Q?eBcyRLVNj/XkF+utnFL0JeWetgsH2XEskyaWWK4nuVVVV0BFQOgdzWtqUH6J?= =?us-ascii?Q?RPyH7+mzxLKVMbJbWr9caqA4baC285wtYDgDWbBXUErSDW3OqYcIqfzSq5th?= =?us-ascii?Q?+HrkeO26oO1Iks1mf6xTEV2zGVNZkDw6vK9uZLh4bCaXl5TnRNg8xu2eYNY1?= =?us-ascii?Q?mwumIT/jlyU1Z0W21zPuaTKM/Ma3M/MizdCzierFdQxmcGDOrJkBfsIVBGcM?= =?us-ascii?Q?RLmrDI68fLIfGpwf4VLGZsvLgwMSxhZ3GRAVES0LHNcf7Xi2qU6mxR5upeXe?= =?us-ascii?Q?2iulIz7ORprNFDZ5wcSmf3C8Jrpcaqg45E0ZfEhKHOuU32Nuc8CRW0+qZIXL?= =?us-ascii?Q?bREniWBCiaY8dvIS5kyZzS9lo4qYXpLtuRKVdL120r6UDExBxDF62hoCBjsc?= =?us-ascii?Q?toYx+cBiCEeDcnocxqs/Xl+6iFHz4lZXbQ/qSTCeErLbvE9jx+TIt5WsqUSO?= =?us-ascii?Q?i2cCuEvn3bHm5NWlTXOKiFLK8rXM0aGeSMUWJuwXtA=3D=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:BY5PR12MB4130.namprd12.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230031)(1800799015)(7416005)(366007)(376005);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?488qiQUBo5zrr+xA0IlwBfXhCmuPHgA1cWr3PcygaFAux5yoyoPJYPwsMUM2?= =?us-ascii?Q?O993mFeHL1aSaOXsBZkXkxV0a3m6opcty65aY6e6pNncxMCnkHLEEqzqU7ux?= =?us-ascii?Q?tkTTuRhkMeMmK2OQP2HDLexsCUt6PQX93FD6mdTrIEnAjoBi87LygWxKNPXw?= =?us-ascii?Q?JmGGIEgKI4hLZ9RE4YZQh/hfa9AR4Vv7ngtXitDMFIjZ5LIPNSPIjZh4B13T?= =?us-ascii?Q?nCE0lSTq47eHJWUT9wWmgQ9+6coQ/GaYMVBq8qXyX/6BZ2ohM8QuAlGNvwxM?= =?us-ascii?Q?W4Xuru6JUXBj2u5Sv/rNE5Sxhi0L6KUQ+ApKruxvavEFO8vfQ0cRPEDG2SeZ?= =?us-ascii?Q?C3vz0ZuuJk8uXH/X7L//2lvIYUouiCiXxvT3DBAJcIDvvanlwUcqXEQssubg?= =?us-ascii?Q?22TTuIaP5M2oKdFdsHwBoz1JPmzI9uk9wCMh2X4Gcydvns2Vp6ZJsoqlewL3?= =?us-ascii?Q?yAKaXkdyvFEIxztzbhyOpNjEjHuZ6uhCgFlY8kXscqbleRkDp83F5LQUQQjI?= =?us-ascii?Q?to/uGVggMpWu1FkJ+MRRLIsXT81rItGUJiMWwFerWv0+thwAqKNE2IpujG+H?= =?us-ascii?Q?P73sZ/TyjI3sCYFGYImNYF2qAJxR8rL6BtomYThcLdpPDs7IqvajTJqObFtL?= =?us-ascii?Q?N2y2baIcP1qnIMjsl+oTl8tvVAkdrKS/1WlueGXzebNNPtM9Kl6s7iNRzObo?= =?us-ascii?Q?6YI5h1/JcSi6El4Hyd8qvwMylGG8iGyqT3GETvS2Zhi59pzBBblazoHQXpr5?= =?us-ascii?Q?o4djVsJhVmE+HuM9Lm9ICOrmuW8ldRLXcw4w8zIHkAFDJ3eWXbw04ewfzxLn?= =?us-ascii?Q?u1U/O2o/HhnvxmVEHfZ4uZlTT4RTc7bYm3fTB6nqI5AaKi7FhXaMlJo19phX?= =?us-ascii?Q?Tlj0zqmWCBwfBK0lZDmOIOuLKumR4OsMtn9mMgje5mm5mJLDG1RvYeSOsKJ9?= =?us-ascii?Q?sRbKVmublX2pUkBBuKSuaEoEYTDktoLlz6EcfNIhOEEWUm3JEM9VJH6liXvK?= =?us-ascii?Q?ijOXKRPFg8ZIHloQNTjAmmX2m4D345dQ8hBW0PzL7qYOQ45ZiAUDzmyJAVd3?= =?us-ascii?Q?RrrppWLLKMvrzzS9hL/4u7V5M0lD202/rvrLLAmJSfwDU2ArDF1q66HPnQLx?= =?us-ascii?Q?fgfMCMOU5c3Me/rFa1YAo0GA0R5lh5Doe99xGw4UUGHKq8GXMWLaYN4qeodU?= =?us-ascii?Q?kpMqIQPAbAycHMetuQZTEip72ing2i/tMCS9LwrmR7SeAZ8LvoNsSq4ei3kk?= =?us-ascii?Q?4H1euxFZ8LQ6LlMSVRjz7UZXLFnzUqwMxS/obzRttH9IDqvCnV0sgbtuXcXa?= =?us-ascii?Q?Rby8ownInKUDGMYHOWzreR0Ljkga8tk9RHAzqSANKuMwxejssrCcWGRicogU?= =?us-ascii?Q?WaEyFDRgv5bxkxcqOcx3woqQSJhdXr1GH+BIBVViP5h50Ha4jrc+lF+zIi5V?= =?us-ascii?Q?BHeUThQBiBdAyWAQ4lNb8yZtYtXwgM2apgfbX75AAa+FmIoyWb022pKAEI8Q?= =?us-ascii?Q?e1R/SBikHmwWHT/IW457bsKHC9+ReUGR2APWYT7qP922L5dmwWAxWKsWHObo?= =?us-ascii?Q?eLIJDhdF987+3d5yUR6q71vvbdkTcFiHQAsooDVHUGitFnbPEb/GsIUy8PWV?= =?us-ascii?Q?Eg=3D=3D?= X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-Network-Message-Id: c1af2471-084f-4c0b-e9ba-08dc7e9021b0 X-MS-Exchange-CrossTenant-AuthSource: BY5PR12MB4130.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 May 2024 21:01:08.5947 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: w2kJJH2Fdy5qpp/VxuN1F+nr0scY/b9DFqV0fqQwzaXvxptI9T7vvdbx5+VULi2Z+E3x07apNbmPNEPxpwyyEA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL3PR12MB6620 First of all, in order to build with clang at all, one must first apply Valentin Obst's build fix for LLVM [1]. Once that is done, then when building with clang, via: make LLVM=1 -C tools/testing/selftests ...clang warns that -no-pie is "unused during compilation". This occurs because clang only wants to see -no-pie during linking. Here, we don't have a separate linking stage, so a compiler warning is unavoidable without (wastefully) restructuring the Makefile. Avoid the warning by simply disabling that warning, for clang builds. [1] https://lore.kernel.org/all/20240329-selftests-libmk-llvm-rfc-v1-1-2f9ed7d1c49f@valentinobst.de/ Signed-off-by: John Hubbard --- tools/testing/selftests/x86/Makefile | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/tools/testing/selftests/x86/Makefile b/tools/testing/selftests/x86/Makefile index d0bb32bd5538..5c8757a25998 100644 --- a/tools/testing/selftests/x86/Makefile +++ b/tools/testing/selftests/x86/Makefile @@ -40,6 +40,13 @@ CFLAGS := -O2 -g -std=gnu99 -pthread -Wall $(KHDR_INCLUDES) # call32_from_64 in thunks.S uses absolute addresses. ifeq ($(CAN_BUILD_WITH_NOPIE),1) CFLAGS += -no-pie + +ifneq ($(LLVM),) +# clang only wants to see -no-pie during linking. Here, we don't have a separate +# linking stage, so a compiler warning is unavoidable without (wastefully) +# restructuring the Makefile. Avoid this by simply disabling that warning. +CFLAGS += -Wno-unused-command-line-argument +endif endif define gen-target-rule-32 -- 2.45.1