Function libgit2_sys::git_submodule_add_setup

pub unsafe extern "C" fn git_submodule_add_setup(
    submodule: *mut *mut git_submodule, 
    repo: *mut git_repository, 
    url: *const c_char, 
    path: *const c_char, 
    use_gitlink: c_int
) -> c_int