That is really exciting. What are your (or anybody else's) high level thoughts about what the intermediary steps will look like? Is it just going to be a matter of swapping out some compilation targets and a few polyfills along the way or are there going to be other possible hiccups?
Right now, you can install Emscripten incoming and compile most portable C/C++ programs with CC='emcc -s WASM=1'. Eventually, Emscripten will be migrated from using an asm.js to wasm translator to using LLVM's WebAssembly backend. I don't know what's going to happen after that...
CC='emcc -s WASM=1'
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