A programming language someday maybe.
Try this for now:
cargo run -- build examples/hi.rio
Or for more fun, which cargo installs wasm-tools and wasmi_cli then builds and runs rio and so on:
cargo run --example bin-test
Or for smaller binary size and maybe faster, though I don't have large enough rio examples yet to know:
cargo run --example bin-test -- --profile release-lto
Example usage of wasm-opt:
wasm-opt -O3 --enable-multivalue --enable-bulk-memory \
examples/out/branch.wasm -o examples/out/branch-opt.wasm