Re: [RFC] build-many-glibcs: Add a rv64gcbv-on-rv64gc/lp64d sub-variant

[Palmer Dabbelt <palmer@rivosinc.com>]

On Tue, 16 Apr 2024 00:01:31 PDT (-0700), michael.hudson@canonical.com wrote:
> On Tue, 16 Apr 2024 at 07:28, Palmer Dabbelt <palmer@rivosinc.com> wrote:
>
>> Unfortunately I don't think we can drop support for the other base ISAs:
>> the distros appear to be targeting rv64gc and that's the only common
>> base for most hardware that's out there.
>>
>
> This is certainly the case for Ubuntu for now but I certainly hope that by
> 26.04 we are able to be a bit more aggressive here, fwiw.

That'd be awesome.  Any idea if something like this would help?  

I think we're all a bit worried about being stuck with a very small 
baseline and thus a bunch of vendor-specific behavior.  That's certainly 
the way things are trending right now in RISC-V land, it's already super 
complicated to manage and it looks like it's going to get worse before 
it gets better.

If we can pick up some extra testing burden now as a way to reduce 
fragmentation then it's probably a win in the long run, even if we have 
to go through a few generations of this before things calm down.  If 
you're planning on moving to something completely different, though, 
then maybe it's not worth the extra builds.

> Cheers,
> mwh