WASI runtime

[vouillon]

It would be interesting to have a version of the runtime which does not depend on JavaScript, probably by linking against wasi-libc.

Some features would not be supported:

• weak pointers
• preserving sharing during marshaling.

Bigarrays would need to be reimplemented using Wasm arrays instead.

[avsm]

When the WASI runtime is supported, you could also have a WASIX extension (see https://wasix.org) which would then support POSIX. This in turn would allow OCaml to be published on wasmer's package registry (https://wasmer.io) and hopefully allow "wasmer run ocaml" to work!

[vouillon]

@avsm Wasmer does not support the Wasm GC proposal, so we are not there yet...