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15.20.8769.025; Fri, 30 May 2025 12:42:08 +0000 Message-ID: Date: Fri, 30 May 2025 18:12:02 +0530 User-Agent: Mozilla Thunderbird Subject: Re: [OE-core] [RFC] rust: Upgrade 1.85.1->1.86.0 To: Khem Raj , alex.kanavin@gmail.com Cc: Patches and discussions about the oe-core layer , "MacLeod, Randy" , "Kokkonda, Sundeep" References: <83e0d268-ec47-4f3a-bf05-2aee4e58e749@windriver.com> <47ba1f68-f67b-4c58-b788-63e06fdf4816@windriver.com> <7571c07b-2225-4449-8169-08b044208072@gmail.com> Content-Language: en-US From: Yash Shinde In-Reply-To: <7571c07b-2225-4449-8169-08b044208072@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: BL6PEPF00013E0B.NAMP222.PROD.OUTLOOK.COM (2603:10b6:22e:400:0:1001:0:10) To PH7PR11MB7593.namprd11.prod.outlook.com (2603:10b6:510:27f::9) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: PH7PR11MB7593:EE_|LV1PR11MB8818:EE_ X-MS-Office365-Filtering-Correlation-Id: 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adjust=0 reason=mlx scancount=1 engine=8.21.0-2505160000 definitions=main-2505300111 List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Fri, 30 May 2025 12:42:16 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/217503 On 30-05-2025 08:02, Khem Raj wrote: > CAUTION: This email comes from a non Wind River email account! > Do not click links or open attachments unless you recognize the sender > and know the content is safe. > > On 5/27/25 9:26 AM, Alexander Kanavin via lists.openembedded.org wrote: >> On Tue, 27 May 2025 at 16:42, Yash Shinde >> wrote: >>> Yeah, that's the reason. >>> >>> I am not sure how rust-lld is installed in ${D} now. A similar error >>> was >>> previously resolved by using: >>> "+TARGET_CC_ARCH += >>> "${LDFLAGS}""(https://git.yoctoproject.org/poky/commit/?id=cc24a0ff76f2e227cc3a0f478d078b2158299a80) >>> >>> >>> LDFLAGS are explicitly unset in rust recipe. >>> (https://git.yoctoproject.org/poky/tree/meta/recipes-devtools/rust/rust_1.85.1.bb#n194) >>> >>> I attempted to remove the "unset LDFLAGS" in rust recipe and exported >>> TARGET_CC_ARCH as above, but that didn't work. >>> >>> Is there some different or recommended way to pass LDFLAGS to rust that >>> I might be missing? >> >> The issue isn't about how to pass LDFLAGS. The issue is that something >> triggers building all these additional things, including rust-lld, and >> you need to narrow down how and where that happens, and how to go back >> to the install set (and build times) we've had in 1.85. Please get to >> the particular point where that decision happens. >> >> We can't just double the build times without a comprehensive, >> convincing investigation. >> > > Try adding > > [rust] > lld = false > > to config.toml, but lld might speed up rust packages themselves. So > perhaps this should be capped under a packageconfig or such, provided > this works. > I investigated the commit histroy between 1.85.1 and 1.86 and found few commits related to building a "self-contained" LLD (rust-lld)as part of rust bootstrap build. This results additional installations during the builds. Here are the commits and PRs: https://github.com/rust-lang/rust/pull/135001 https://github.com/rust-lang/rust/commit/8744b44e6bde053f7656a3c727c968177ee8e4b6 Additionally, there's ongoing development to make LLD as the default linker for x86_64-unknown-linux-gnu. https://github.com/rust-lang/rust/pull/140525 As Khem mentioned, setting lld = false in config.toml doesn't build LLD. Furthermore, using "use-lld = false" ensures that LLD is not used as the default linker, causing the build to fall back to the system's default linker. This restores the earlier behavior. Also, the package QA error for rust-lld is not seen with this. Regards, Yash >> Alex >> >