libpathrs-sys crate?

[cyphar]

It might actually make sense to provide a libpathrs-sys crate which uses the cdylib to provide the regular libpathrs API. This is because the Rust crate is licensed LGPLv3-or-later, which will probably cause some issues for Rust programs that want to ship binaries (in practice an open source binary won't have issues because you are not forced to make the entire project LGPLv3, but I suspect a lot of people wouldn't bother).

If we do, in theory we could also solve #46, though I suspect you can't get cross-crate coverage...