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 create a new build directory, enter it and configure your project:
mkdir build.em cd build.em emcmake cmake .. -D32BLIT_DIR="/path/to/32blit/repo"
:warning: Make sure to include the -D32BLIT_DIR="/path/to/32blit/repo" parameter to the cmake command (even when building the SDK examples). You must specify an absolute path here when building with Emscripten.
Once CMake has finished configuring your project you can build it:
make python3 -m http.server
Finally, open the URL given by Python‘s HTTP server in your browser and open your project’s .html file.