[azakai]

There is already SDL2 support for emscripten, and emscripten can compile to WebAssembly with the WASM flag flipped on. So basically just use emcc with

-s WASM=1 -s USE_SDL=2

for WebAssembly + SDL2.

The test_sdl2* tests in emscripten's test suite have working samples in them,

https://github.com/kripken/emscripten/blob/master/tests/test...

A full SDL1 testcase is in the tutorial,

http://kripken.github.io/emscripten-site/docs/getting_starte...