Re: [PATCH V16 4/7] rust/powerpc: Set min rustc version for powerpc

[Miguel Ojeda]

On Fri, Jun 26, 2026 at 8:50 AM Mukesh Kumar Chaurasiya
<mkchauras@xxxxxxxxx> wrote:
>
> This corresponds to a floating point instruction. Although we have
> disabled fpu, vsx and altivec we are still generating these. Seems like
> we have some issue with the rustc here. I didn't dive deeper into this.
>
> Is it ok if we keep 1.95 as base for powerpc64le?

It may be that it is generated but unused (we have that issue
elsewhere -- see e.g. `rust/compiler_builtins.rs`).

Having said that, if 1.95 is fine for the powerpc arch maintainers,
then that is fine (s390 also used a higher minimum -- please see the
recent change in `scripts/min-tool-version.sh`).

But please try to bisect upstream Rust to see where the change
happened, i.e. what is the root cause? e.g. `core` changes, `rustc`
changes, built-in LLVM changes... It could be that it is not tied to
the `rustc` version but LLVM's.

Cheers,
Miguel