failed use statements?

[nickdesaulniers]

Trying out some FFI

➜ rustc version.rs
versions.rs:7:29: 7:35 error: use of undeclared type name `c_char`
versions.rs:7     fn version_string () -> *c_char;
                                           ^~~~~~
versions.rs:8:39: 8:45 error: use of undeclared type name `c_uint`
versions.rs:8     fn version_interface_current () -> c_uint;
                                                     ^~~~~~
versions.rs:9:40: 9:46 error: use of undeclared type name `c_uint`
versions.rs:9     fn version_interface_revision () -> c_uint;
                                                      ^~~~~~
versions.rs:10:35: 10:41 error: use of undeclared type name `c_uint`
versions.rs:10     fn version_interface_age () -> c_uint;
                                                  ^~~~~~
error: aborting due to 4 previous errors

➜  re2  cat versions.rs

use core::libc::{c_char, c_uint};

mod re2 {
  #[link_name = "cre2"]
  #[link_args = "-lcre2"]
  extern {
    fn version_string () -> *c_char;
    fn version_interface_current () -> c_uint;
    fn version_interface_revision () -> c_uint;
    fn version_interface_age () -> c_uint;
  }
}

fn version_interface_age () -> c_uint {
  unsafe {
    re2::version_interface_age()
  }
}

fn main () {
  io::println(fmt!("%?", version_interface_age));
}

[nickdesaulniers]

nvm!