This is a fork of Rust with support for the wasix, a Webassembly target that is a superset of wasi, extended with additional functionality.
See wasix.org for more details.
To compile Rust code to wasix, you should usually use the cargo-wasix cargo wrapper.
It will automatically download pre-built versions of the wasix Rust toolchain, and handles automating the integration with cargo.
See the above repository for more information.