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Tue, 12 Dec 2023 17:44:38 -0800 Received: from [10.110.48.28] (10.126.231.35) by rnnvmail201.nvidia.com (10.129.68.8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.41; Tue, 12 Dec 2023 17:44:38 -0800 Message-ID: <6df6e8e5-8d5b-4d3d-91b5-bc0e90c424ea@nvidia.com> Date: Tue, 12 Dec 2023 17:44:37 -0800 Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3] docs: rust: Add rusttest info Content-Language: en-US To: Miguel Ojeda CC: Dirk Behme , , Nathan Chancellor References: <20231211121613.3489513-1-dirk.behme@de.bosch.com> From: John Hubbard In-Reply-To: Content-Type: text/plain; charset="UTF-8"; format=flowed Content-Transfer-Encoding: 8bit X-ClientProxiedBy: rnnvmail201.nvidia.com (10.129.68.8) To rnnvmail201.nvidia.com (10.129.68.8) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000E9DB:EE_|CY8PR12MB7097:EE_ X-MS-Office365-Filtering-Correlation-Id: 1b1f9b7d-114d-42f0-5823-08dbfb7d1934 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Dec 2023 01:44:51.4308 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1b1f9b7d-114d-42f0-5823-08dbfb7d1934 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000E9DB.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR12MB7097 On 12/12/23 04:43, Miguel Ojeda wrote: > On Tue, Dec 12, 2023 at 4:14 AM John Hubbard wrote: >> >> "make LLVM=1 " doesn't work for me, and therefore I suspect it >> doesn't work for at least a few other people, as well. >> >> Instead, I have to run "make CC=clang ", which works just >> fine. >> >> The docs should consistently reflect this, yes? > > No, they should not. `LLVM=1` is the "right" one for all architectures > (except s390) -- see Documentation/kbuild/llvm.rst. ah OK. I appear to have been slightly misled by Documentation/rust/quick-start.rst, which made it seem like CC=clang was...a thing. This excerpt made me do it: Building a kernel with a complete LLVM toolchain is the best supported setup at the moment. That is:: make LLVM=1 For architectures that do not support a full LLVM toolchain, use:: make CC=clang > > If `LLVM=1` does not work for you, then that should be fixed. Could > you please give some details? For instance, is it related to Rust > (does it work with a `defconfig` build without enabling Rust)? Do you > have all the LLVM software installed with the right names (see what > `LLVM=1` expands to)? etc. > > (Cc'ing Nathan) > Probably just a basic failure to fully set up LLVM on my part. I'll use the bug reporting that Nathan pointed to, if it turns out that there is anything actually wrong upstream. I just short-circuited the whole investigation (it's a "quick" start, after all) when I saw the CC=clang point. Anyway, I wanted to provide this "how does the documentation look to a newcomer" feedback, in case it helps. thanks, -- John Hubbard NVIDIA