ern0/howto-wasm-minimal

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howto-wasm-minimal How to create minimal wasm module - PoC Goals use no Emscripten or any libs simple toolchain, compile to wasm in a single step wasm may use memory prepared by JavaScript do something relative compute-intensive do something visible Mystic issue Symptom: on some systems, the linker may hang, or produce output file with correct size but full of zeros (that's why build script contains a hexdump as last step). Solution: update your linker. More info: https://stackoverflow.com/questions/71573019/cant-compile-to-wasm-on-linux Install You need CLANG and CLANG's linker (LLD). Tested on versions 13 and 14. Debian nightly pacakges: https://apt.llvm.org/ On MacOS, you should install CLANG from homebrew. More info on Mac troubleshooting: https://til.simonwillison.net/webassembly/compile-to-wasm-llvm-macos On Windows, you may use Chocolatey package manager to install CLANG: https://chocolatey.org/ Summary Why WASM? Writing web app in any language which is not JavaScript is just pure joy. Try it The color change and the blur effect is a WASM module, written in C: http://linkbroker.hu/stuff/howto-wasm-minimal/