Re: [Qemu-devel] [PATCH v1 1/1] configure: Add RISC-V host support

[Peter Maydell]

On 30 July 2018 at 18:24, Alistair Francis <address@hidden> wrote:
> On Sun, Jul 29, 2018 at 4:28 AM, Peter Maydell <address@hidden> wrote:
>>> Another piece that even Michael Clark does not have is
>>> linux-user/host/*/safe-syscall.S.
>>
>> It might be nice to complete the safe-syscall stuff for all hosts,
>> and then remove the fallback that lets you build an unreliable
>> linux-user binary without it...
>
> At the moment though QEMU won't build with Linux user. So some work is
> required just to get the build working.

Right -- it's not really sufficient to just change configure.
I'd rather see:
 (a) a proper backend for any host CPU type we actually care about,
 which is what Michael's work is doing
 (b) support for the various per-host-arch things that are needed
     like the safe-syscall shim
 (c) QEMU's build infrastructure guiding the process of implementing
     both of those, by making it a build failure to not provide
     all the set of things, rather than producing a configuration
     that will build but not work reliably

thanks
-- PMM