Hi Alejandro,

Thanks for chasing this one down. Small notes on v3:

The commit is tagged [YOCTO #15554], but that bug is "reproducibility
failures with 'rustdoc' on rust 1.75" (path-length dependent), RESOLVED FIXED
since 2024-08-01 via codegen-units=1 / lto=off.

What you describe here - artifacts differing by build host arch, causing
cross-architecture sstate matches - looks like:

[YOCTO #16376] AB-INT: build system architecture reproducibility issue
https://bugzilla.yoctoproject.org/show_bug.cgi?id=16376

which is still open. Could you retag it in v4, unless you had a reason to
point at 15554 that I'm missing?
---
One pointer that may or may not be relevant: the 1.97.1 upgrade (65271a5d3b)
carries an LLVM backport:

0043-LoopUnroll-Iterate-exit-fold-candidates-in-determini.patch

added for a repro issue seen with rust 1.97.0. I haven't looked at whether it
interacts with the SVH path at all - just flagging it in case it's useful context.

Thanks,
Sunil Dora