Correctly generate stamp for gcc

Author: GuillaumeGomez

src/bootstrap/src/core/build_steps/gcc.rs

@@ -53,8 +53,9 @@ pub fn prebuilt_gcc_config(builder: &Builder<'_>, target: TargetSelection) -> Gc
     static STAMP_HASH_MEMO: OnceLock<String> = OnceLock::new();
     let smart_stamp_hash = STAMP_HASH_MEMO.get_or_init(|| {
         generate_smart_stamp_hash(
-            &builder.config.src.join("src/llvm-project"),
-            builder.in_tree_llvm_info.sha().unwrap_or_default(),
+            builder,
+            &builder.config.src.join("src/gcc"),
+            builder.in_tree_gcc_info.sha().unwrap_or_default(),
         )
     });
 

src/bootstrap/src/lib.rs

@@ -145,6 +145,7 @@ pub struct Build {
     rustfmt_info: GitInfo,
     enzyme_info: GitInfo,
     in_tree_llvm_info: GitInfo,
+    in_tree_gcc_info: GitInfo,
     local_rebuild: bool,
     fail_fast: bool,
     doc_tests: DocTests,
@@ -315,6 +316,7 @@ impl Build {
 
         // we always try to use git for LLVM builds
         let in_tree_llvm_info = GitInfo::new(false, &src.join("src/llvm-project"));
+        let in_tree_gcc_info = GitInfo::new(false, &src.join("src/gcc"));
 
         let initial_target_libdir_str = if config.dry_run() {
             "/dummy/lib/path/to/lib/".to_string()
@@ -407,6 +409,7 @@ impl Build {
             rustfmt_info,
             enzyme_info,
             in_tree_llvm_info,
+            in_tree_gcc_info,
             cc: RefCell::new(HashMap::new()),
             cxx: RefCell::new(HashMap::new()),
             ar: RefCell::new(HashMap::new()),