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# How to build the docker images:
In the root of the WZ repo:
- `docker build -f docker/<subdir>/Dockerfile -t <build_image_name> .`
For example:
```shell
docker build -f docker/ubuntu-20.04/Dockerfile -t ubuntu .
```
For more information, see the documentation on [`docker build`](https://docs.docker.com/engine/reference/commandline/build/).
# How to build Warzone 2100 using the docker image:
Beware of line ending mismatch between Windows and Linux when cloning repo.
### Ubuntu
- via CMake
```shell
docker run --rm -v $(pwd):/code <build_image_name> cmake '-H.' -Bbuild -DCMAKE_BUILD_TYPE=Debug -G"Ninja"
docker run --rm -v $(pwd):/code <build_image_name> cmake --build build
```
### Cross-compile (for Windows)
- via CMake
```shell
docker run --rm -v $(pwd):/code <build_image_name> i686-w64-mingw32.static-cmake '-H.' -Bbuild -DCMAKE_BUILD_TYPE=Debug -G"Ninja"
docker run --rm -v $(pwd):/code <build_image_name> cmake --build build --target package
```
This will build the full Windows (portable) installer package.
# Tips
### Using CMake
The examples above build `DEBUG` builds.
To build a Release mode build (with debugging symbols), change:
- `-DCMAKE_BUILD_TYPE=Debug`
to:
- `-DCMAKE_BUILD_TYPE=RelWithDebInfo`
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