Function libgit2_sys::git_submodule_add_setup

pub unsafe extern 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