1 extern crate autocfg;
2
3 use std::env;
4
5 /// Tests that autocfg uses the RUSTFLAGS or CARGO_ENCODED_RUSTFLAGS
6 /// environment variables when running rustc.
7 #[test]
test_with_sysroot()8 fn test_with_sysroot() {
9 // Use the same path as this test binary.
10 let dir = env::current_exe().unwrap().parent().unwrap().to_path_buf();
11 env::set_var("OUT_DIR", &format!("{}", dir.display()));
12
13 // If we have encoded rustflags, they take precedence, even if empty.
14 env::set_var("CARGO_ENCODED_RUSTFLAGS", "");
15 env::set_var("RUSTFLAGS", &format!("-L {}", dir.display()));
16 let ac = autocfg::AutoCfg::new().unwrap();
17 assert!(ac.probe_sysroot_crate("std"));
18 assert!(!ac.probe_sysroot_crate("autocfg"));
19
20 // Now try again with useful encoded args.
21 env::set_var(
22 "CARGO_ENCODED_RUSTFLAGS",
23 &format!("-L\x1f{}", dir.display()),
24 );
25 let ac = autocfg::AutoCfg::new().unwrap();
26 assert!(ac.probe_sysroot_crate("autocfg"));
27
28 // Try the old-style RUSTFLAGS, ensuring HOST != TARGET.
29 env::remove_var("CARGO_ENCODED_RUSTFLAGS");
30 env::set_var("HOST", "lol");
31 let ac = autocfg::AutoCfg::new().unwrap();
32 assert!(ac.probe_sysroot_crate("autocfg"));
33 }
34