wasi-sdk

> C without the standard library (called “libc”) is pretty rough If you don't want to pull in musl or a traditional libc, there's a more Wasm-y solution known as the Web Assembly System Interface (WASI) [0] that delegates the libc functionality to the runtime. A WASI Wasm module can be compiled using clang, as in the article. The only difference is to use the WASI sysroot [1]. > optimization LTO and -O3 are great! I've also found the Twiggy [2] tool useful for more "manual" optimization. [0] https://wasi.dev [1] https://github.com/CraneStation/wasi-sdk/releases [2] https://rustwasm.github.io/twiggy/

Nice comprehensive writeup. The next step, beyond the basic allocator provided, would be to use wasi-sdk (https://github.com/cranestation/wasi-sdk) which provides a full musl-based libc, targeting the WASI interfaces. With this, you can invoke a C program with arguments, environment variables, and filesystem access.