Building in Emscripten - asm.js/WebAssembly - works on Linux and WSL.
You will need to install the emscripten compiler. See https://emscripten.org/docs/getting_started/downloads.html for complete instructions, but generally you should just browse to your desired directory and:
git clone https://github.com/emscripten-core/emsdk.git cd emsdk ./emsdk install latest ./emsdk activate latest source ./emsdk_env.sh
You should now have commands like emcc in your path, and an EMSDK environment variable set ready to build your project.
In your project directory:
mkdir build.em cd build.em emcmake cmake .. -G "Unix Makefiles" make python3 -m http.server
If your project is based on the template, make sure to include the -D32BLIT_PATH="/path/to/32blit/repo" parameter to the cmake command.
Finally, open the URL given by Python‘s HTTP server in your browser and open your project’s .html file.