Make godot-cpp installable with CMake/SCons #1418
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AThousandShips
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Please open a proposal to track the support and details of this feature, this is pretty specific and we'd need to judge the actual demand |
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Fixes #34492 - [X] Changes comply with the [maintainer guide](https://github.com/microsoft/vcpkg-docs/blob/main/vcpkg/contributing/maintainer-guide.md). - [X] The name of the port matches an existing name for this component on https://repology.org/ if possible, and/or is strongly associated with that component on search engines. - [X] Optional dependencies are resolved in exactly one way. For example, if the component is built with CMake, all `find_package` calls are REQUIRED, are satisfied by `vcpkg.json`'s declared dependencies, or disabled with [CMAKE_DISABLE_FIND_PACKAGE_Xxx](https://cmake.org/cmake/help/latest/variable/CMAKE_DISABLE_FIND_PACKAGE_PackageName.html). - [X] The versioning scheme in `vcpkg.json` matches what upstream says. - [X] The license declaration in `vcpkg.json` matches what upstream says. - [X] The installed as the "copyright" file matches what upstream says. - [X] The source code of the component installed comes from an authoritative source. - [X] The generated "usage text" is accurate. See [adding-usage](https://github.com/microsoft/vcpkg-docs/blob/main/vcpkg/examples/adding-usage.md) for context. - [X] The version database is fixed by rerunning `./vcpkg x-add-version --all` and committing the result. - [X] Only one version is in the new port's versions file. - [X] Only one version is added to each modified port's versions file. Notes: - This library is static only, so it's only supported for the static triplets. - Unfortunately, godot-cpp is not yet installable, so I had to patch its cmake script. I have made a PR upstream: godotengine/godot-cpp#1418 But in the meanwhile, I have created an unofficial export target `unofficial::godot::cpp`.
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With #1595 restructuring the CMake code, this PR has been changed to reflect that. |
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godot-cpp can be installed like this:
cmake && make && make install
It can be used like this:
find_pacakge("godot")
target_link_libraries("my_gdextension_project" PRIVATE "godot::cpp")
The install destination uses CMAKE_INSTALL_ so that package managers
can choose the best location for these artifacts
As BUILD_INTERFACE requires absolute path, this means that
GODOT_GDEXTENSION_DIR needs to be an absolute path
This for interoperability with other build systems
This aims to have feature parity with the installation via cmake
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This PR allows this library to be installable.
So the library can be built like this:
Via CMake:
Or via SCons:
A GDExtension project can use this library like so:
Via CMake:
Or via SCons:
Reason
Currently the only supported way to use godot-cpp is to use as a subproject of your project.
It kinda works but it's rather cumbersome because you need to rebuild godot-cpp when you build your project from scratch. This can be especially painful in CI.
By allowing godot-cpp to be installable one can prevent unnecessary rebuilds.
This also allows usage with a package manager (e.g vcpkg).
As this also install a pkg-config file, godot-cpp can be used by projects that doesn't use neither CMake nor SCons.