Ideally, bindings could be generated completely automatically, by parsing C headers with clang and generating appropriate interfaces. Languages that have support for this:
- Python with ctypeslib2
- Rust with rust-bindgen
- Go with c-for-go
- Haskell with c2hs
- Ada with GNAT bindings generator
See, for example, how I generate bindings automatically for radare2 C headers using those in genbind.py script. It is very simple and straightforward. I wish something like that existed for OCaml.