Re: Help wanted improving Rust support for RISC-V

> On 16. Nov 2024, at 15:26, Alan Somers <asomers@freebsd.org> wrote:
> 
> 
> 
> On Sat, Nov 16, 2024, 2:21 AM Tom Jones <thj@freebsd.org> wrote:
> 
> 
> On Fri, Nov 15, 2024, at 23:47, Alan Somers wrote:
>> I want to improve the state of Rust on FreeBSD in general, and RISC-V
>> in particular.  My plan is:
>> 
>> * Assemble a corpus of crates heavy on OS stuff (like Nix and Tokio)
>> and ensure that their tests pass on Riscv FreeBSD.
>> * Update libc's ABI to FreeBSD 12, finally eliminating the need for
>> COMPAT_11 on riscv to run Rust programs.
>> * Ensure that the corpus of crates still passes their tests.
>> * Convince the libc maintainers to use the FreeBSD 12 ABI, for riscv only.
>> * After a full Rust release cycle (at least 6 weeks), and maybe two,
>> if there are no reports of breakage, and if Poudriere looks good, use
>> that as justification to raise libc's ABI for all architectures.
>> 
>> But in order to do any of this, I need access to riscv hardware.  A
>> virtual instance at Scaleway[^1][^2] would be ideal, but I don't know
>> if FreeBSD can run there.  Has anybody tried it?  Failing that, I
>> would need to either acquire some hardware myself, or borrow access to
>> somebody else's.  Or, convince some other developer to do the work
>> himself.  But I won't be able to help very much if I don't have direct
>> access.
>> 
>> Can anybody on this list help me get some access?
> 
> I can’t help with scaleway, it sounds like an interesting choice.
Hi Alan,
neither can I... Depending on the resources you are willing to spend,
https://eu.mouser.com/ProductDetail/SiFive/HF105-001?qs=Imq1NPwxi75JBw6ulD0quQ%3D%3D
might be an option.

Best regards
Michael
> 
> I have no idea of the current state of easily and affordable available hardware. The visonfive 2 might be a good choice, there has been a lot of work in the year since I last tried it. 
> 
> https://adventurist.me/posts/00315
> 
> It’s probably still the easiest to get hold of if a little underwhelming. 
> 
> You don’t mention qemu, is there some reason you can’t start there?
> 
> - Tom
> 
> I haven't had good luck with using qemu-user-static to emulate armv7.