wrong, there is no complexity

    clang --target=wasm32

That's it, you target WASM

People somewhere decided that it was too easy and went ahead to bloat everything with Emscripten, WASI and the like

Here is all you need to know to target WASM: https://schellcode.github.io/webassembly-without-emscripten

The only target for WASM is the browser, everything else is just bloat and a waste of energy