This confirmed works on Xcode 16, and Xcode 16.1 Beta 2, with CMake 3.28
or higher.
On linux, the 6.0.0 release from swiftly is still missing my libstdc++
workaround, so it needs a snapshot to work.
This project is a part of the Xcode-shipped toolchain on macOS, but
needs built from source on other platforms. However, using the Xcode
version of the framework leads to a bunch of rpath confusion when
trying to link it the expected way. I suspect that there will be a
more intuitive way to link this library from the toolchain when it
stabilizes. So we'll build it everywhere :)
