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https://github.com/JGRennison/OpenTTD-patches.git
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40 lines
1.4 KiB
Markdown
40 lines
1.4 KiB
Markdown
## How to build with Emscripten
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Please use docker with the supplied `Dockerfile` to build for emscripten.
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It takes care of a few things:
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- Use a version of emscripten we know works
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- Patch in LibLZMA support (as this is not supported by upstream)
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- Patch in nlohmann-json support (as this is not supported by upstream)
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First, build the docker image by navigating in the folder this `README.md` is in, and executing:
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```
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docker build -t emsdk-openttd .
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```
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Next, navigate back to the root folder of this project.
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Now we build the host tools first:
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```
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mkdir build-host
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docker run -it --rm -v $(pwd):$(pwd) -u $(id -u):$(id -g) --workdir $(pwd)/build-host emsdk-openttd cmake .. -DOPTION_TOOLS_ONLY=ON
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docker run -it --rm -v $(pwd):$(pwd) -u $(id -u):$(id -g) --workdir $(pwd)/build-host emsdk-openttd make -j$(nproc) tools
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```
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Finally, we build the actual game:
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```
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mkdir build
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docker run -it --rm -v $(pwd):$(pwd) -u $(id -u):$(id -g) --workdir $(pwd)/build emsdk-openttd emcmake cmake .. -DHOST_BINARY_DIR=../build-host -DCMAKE_BUILD_TYPE=Release -DOPTION_USE_ASSERTS=OFF
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docker run -it --rm -v $(pwd):$(pwd) -u $(id -u):$(id -g) --workdir $(pwd)/build emsdk-openttd emmake make -j$(nproc)
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```
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In the `build` folder you will now see `openttd.html`.
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To run it locally, you would have to start a local webserver; something like:
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```
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cd build
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python3 -m http.server
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````
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You can now play the game via http://127.0.0.1:8000/openttd.html .
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