Re: Rust in Qemu BoF followup: Rust vs. qemu platform support

[David Gibson <david@gibson.dropbear.id.au>]

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On Fri, Sep 17, 2021 at 11:17:01AM +0200, Cornelia Huck wrote:
> On Fri, Sep 17 2021, David Gibson <david@gibson.dropbear.id.au> wrote:
> 
> > Hi all,
> >
> > At the qemu-in-rust BoF at KVM Forum, I volunteered to look into
> > whether Rust supported all the host/build platforms that qemu does,
> > which is obviously vital if we want to make Rust a non-optional
> > component of the build.
> >
> > I've added the information to our wiki at:
> > 	https://wiki.qemu.org/RustInQemu
> 
> Thank you for doing that!
> 
> >
> > TBH, the coverage is not as good as I expected.  Linux, macOS and
> > Windows are pretty much ok, with the exception of Linux on Sparc.
> > There are a lot of gaps in *BSD support, however.
> 
> Yes :(
> 
> Do we actually have an idea what we would require?

Not t this stage.  This is just based on the ticks in the table on the
Rust page, I haven't tried to look closer at any of the cases.

> I'm surprised that
> there are so many targets without host tools or without std support (but
> maybe they are only missing small things.)

Right.  So, it makes sense that Rust has a bunch of targets without
that support: a lot of them are embedded systems, where you'd expect
to be cross-compiling.  The intersection of that with the qemu build
platforms is weirder.

> > I've included some notes on where the information comes from, and some
> > uncertainties in there.
> >
> > I've made an effort to get the information correct, but double
> > checking would be appreciated.
> 
> I did not spot any errors on a quick cross check, but I'm not really
> sure about what the BSDs support.
> 
> >
> > I haven't yet looked into the packaging situation for the Rust
> > toolchain on various platforms and distros, but I still intend to do
> > so.
> 

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson

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