## How to build with Emscripten Building with Emscripten works with emsdk 2.0.31 and above. Currently there is no LibLZMA support upstream; for this we suggest to apply the provided patch in this folder to your emsdk installation. For convenience, a Dockerfile is supplied that does this patches for you against upstream emsdk docker. Best way to use it: Build the docker image: ``` docker build -t emsdk-lzma . ``` Build the host tools first: ``` mkdir build-host docker run -it --rm -v $(pwd):$(pwd) -u $(id -u):$(id -g) --workdir $(pwd)/build-host emsdk-lzma cmake .. -DOPTION_TOOLS_ONLY=ON docker run -it --rm -v $(pwd):$(pwd) -u $(id -u):$(id -g) --workdir $(pwd)/build-host emsdk-lzma make -j5 tools ``` Next, build the game with emscripten: ``` mkdir build docker run -it --rm -v $(pwd):$(pwd) -u $(id -u):$(id -g) --workdir $(pwd)/build emsdk-lzma emcmake cmake .. -DHOST_BINARY_DIR=../build-host -DCMAKE_BUILD_TYPE=Release -DOPTION_USE_ASSERTS=OFF docker run -it --rm -v $(pwd):$(pwd) -u $(id -u):$(id -g) --workdir $(pwd)/build emsdk-lzma emmake make -j5 ``` And now you have in your build folder files like "openttd.html". To run it locally, you would have to start a local webserver, like: ``` cd build python3 -m http.server ```` Now you can play the game via http://127.0.0.1:8000/openttd.html .