| use std::env; |
| use std::path::PathBuf; |
| |
| fn main() { |
| println!("cargo:rerun-if-changed=build.rs"); |
| println!("cargo:rustc-env=BUILD_TRIPLE={}", env::var("HOST").unwrap()); |
| |
| // This may not be a canonicalized path. |
| let mut rustc = PathBuf::from(env::var_os("RUSTC").unwrap()); |
| |
| if rustc.is_relative() { |
| for dir in env::split_paths(&env::var_os("PATH").unwrap_or_default()) { |
| let absolute = dir.join(&rustc); |
| if absolute.exists() { |
| rustc = absolute; |
| break; |
| } |
| } |
| } |
| assert!(rustc.is_absolute()); |
| |
| // FIXME: if the path is not utf-8, this is going to break. Unfortunately |
| // Cargo doesn't have a way for us to specify non-utf-8 paths easily, so |
| // we'll need to invent some encoding scheme if this becomes a problem. |
| println!("cargo:rustc-env=RUSTC={}", rustc.to_str().unwrap()); |
| } |