This project corresponds to https://epigeos.com/hydor/reo

It's totally not finished, e.g. the sunset/sunrise function isn't right and so all it's derivatives weren't even checked
The TODO file is mixed from the previous state of the project and current, files also contain // TODO comments
The build file is made specifically for x86_64 linux

The frontend is based on SDL3, currently 3.2.8 and SDL3_ttf 3.2.2 And so the two are required for building, as well as Android NDK when targeting android