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I like ECL for its ability to compile Lisp to C and have a native executable. One dream I have is to write a game using the CL-SDL2 bindings and cross compile it for Wasm; It seems possible to do now but the flow isn't very well defined. I got pretty close hacking around a month or two ago but didn't quite finish.

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Historically it's been hamstrung by wasm's lack of tail call elimination, but that appears to have been merged: https://v8.dev/blog/wasm-tail-call

That's why the support is "preliminary". I plan to write some compelling examples for the emscripten target. Here is a "raw" build that shows repl (on some browsers results of evaluation show in the javascript console): http://turtleware.eu/static/ecl/ecl.html -- this is a little older build, but following instructions in INSTALL will get you to the same place.

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