1extern crate autocfg;
2
3fn main() {
4    // Normally, cargo will set `OUT_DIR` for build scripts.
5    let ac = autocfg::AutoCfg::with_dir("target").unwrap();
6    for i in 3..8 {
7        ac.emit_has_type(&format!("i{}", 1 << i));
8    }
9}
10