| Rust's mangling ordinarily incorporates the compiler's version. If we want name |
| stability across compiler upgrades (e.g., for AFDO), this is undesirable. |
| |
| diff --git a/compiler/rustc_span/src/def_id.rs b/compiler/rustc_span/src/def_id.rs |
| index bbeabdb55a7..e581fffb377 100644 |
| --- a/compiler/rustc_span/src/def_id.rs |
| +++ b/compiler/rustc_span/src/def_id.rs |
| @@ -180,6 +180,11 @@ pub fn new(crate_name: &str, is_exe: bool, mut metadata: Vec<String>) -> StableC |
| // during testing. |
| if let Some(val) = std::env::var_os("RUSTC_FORCE_RUSTC_VERSION") { |
| hasher.write(val.to_string_lossy().into_owned().as_bytes()) |
| + } else if std::env::var_os("CROS_RUSTC_IGNORE_VERSION_IN_MANGLING") |
| + .filter(|x| !x.is_empty()) |
| + .is_some() |
| + { |
| + hasher.write(b"cros-rust"); |
| } else { |
| hasher.write(option_env!("CFG_VERSION").unwrap_or("unknown version").as_bytes()); |
| } |
