Re: [OE-core] [PATCH v2] rust: Avoid passing host-specific information to crates Strict Version Hash

["Mathieu Dubois-Briand" <mathieu.dubois-briand@bootlin.com>]

On Tue Aug 25, 2026 at 1:56 AM CEST, Alejandro Hernandez Samaniego via lists.openembedded.org wrote:
> rustc computes each crate's Strict Version Hash (SVH) using inputs that include
> the *stage0/stage1 bootstrap compiler* fingerprint, which in turn depends on the
> build host arch.
>
> This eventually may cause sstate matches across architectures for artifacts that
> are actually different, causing autobuilder intermitent reproducibility issues.
>
> To avoid this, pass a fixed value instead of host-specific bits to the specified
> hash.
>
> [YOCTO #15554]
>
> Assisted-by: AI - OpenAI
> Signed-off-by: Alejandro Hernandez <alhe@linux.microsoft.com>

Hi Alejandro,

This looks broken here:

ERROR: rust-native-1.97.1-r0 do_install: Execution of '/srv/pokybuild/yocto-worker/genericx86-64/build/build/tmp/work/x86_64-linux/rust-native/1.97.1/temp/run.do_install.2682640' failed with exit code 1
...
ERROR: Logfile of failure stored in: /srv/pokybuild/yocto-worker/genericx86-64/build/build/tmp/work/x86_64-linux/rust-native/1.97.1/temp/log.do_install.2682640
...
|     Building [==================>      ] 275/348: object, schemars, tracing-s…
|    Compiling rustc_span v0.0.0 (/srv/pokybuild/yocto-worker/genericx86-64/build/build/tmp/work-shared/rust-source-1.97.1-r0/sources/rustc-1.97.1-src/compiler/rustc_span)
|     Building [==================>      ] 276/348: object, schemars, tracing-s…
| error: expected `;`, found `StableCrateId`
|    --> /rustc-dev/8bab26f4f68e0e26f0bb7960be334d5b520ea452/compiler/rustc_span/src/def_id.rs:200:59
|     |
| 200 |         hasher.write(b"

https://autobuilder.yoctoproject.org/valkyrie/#/builders/4/builds/4510

Can you have a look at the issue?

Thanks,
Mathieu

-- 
Mathieu Dubois-Briand, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com