Are there any general tips or best practices for bindings in dub packages?

For example, I love the d2sqlite3 package. It just works out of the box. No linker configuration or anything. However, that is probably a testament to sqlite's lack of dependencies. That cannot work for libraries, which rely on other libraries.

Should the C code be included in the Github repo? Are submodules fine? Should the C build be invoked by dub via "preBuildCommands"? What about system libraries? Can that be made cross-platform? Should lflags be specified in the dub config or should they be passed via environment variable?

There should be a general guide for this. Maybe there already is one?