New Emscriptem WebAssembly target + examples #4486
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This is a follow-up to the email I sent Matz last week asking if there was any plan to running Ruby on WebAssembly. I decided to give it a shot. In this pull request you'll find:
A new crossbuild file to target Emscripten WebAssembly. For this MRUBY_CONFIG to work you need to install Emscripten on your machine first (emcc compiler)
Once you have build the emcc-wasm target go to examples/emcc-wasm and run the compile script to generate the two Web Assembly examples
This proves that we can run mruby in the Emscripten WebAssembly runtime. This is however "just" a demonstrator as what we are showing here is the RiteVM mruby VM running within the Wasm VM. So from a performance standpoint we could do much better if mruby could generate WebAssembly bitcode. I don't know what's the best way of doing this though. Generate WebAssembly directly or "transpile" RiteVM instructions to WebAssembly bitcode ?
Comments, feedback welcome