Problem: I am developing a Rust integration layer for a vendor C library and I want to support multiple versions of that C library.
Simple example: C library V1 exposes "get_name" and V2 exposes "get_name2". From a rust perspective the signature is roughly:
fn get_name() -> String... but the C bindings are different because uses an output
char and the other uses an output
char **. There are about 300 C functions in total that are exposed in the API and about 30 of them are different between V1 and V2.
I know that I can use bindgen to create the different bindings but I am curious how others have tried to solve this problem? Would you generate two different crates of C bindings, one for V1 and one for V2 and then use cargo/features to pull in the correct one?
Would you just use cfg attributes to do conditional compilation in a crate that depends on the C level bindings? Or some other approach?