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

[Mukesh Kumar Chaurasiya]

On Fri, Jun 26, 2026 at 12:17:50PM +0200, Miguel Ojeda wrote:
> 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
Hey Miguel, 

Sure i'll bisect. Meanwhile i would still like to get this upstream.

Hey @Madhavan,

Can we pick this version up for ppc?

Regards,
Mukesh