Skip LLVM rebuild when skip-rebuild is true

diff --git a/src/bootstrap/native.rs b/src/bootstrap/native.rs
index afee154fe714314e614fb30f540219d47b44de37..2a4e9903e5527d4a4c801c0c53000499e453253c 100644 (file)
--- a/src/bootstrap/native.rs
+++ b/src/bootstrap/native.rs
@@ -70,6 +70,15 @@ fn run(self, builder: &Builder<'_>) -> PathBuf {
         let done_stamp = out_dir.join("llvm-finished-building");
 
         if done_stamp.exists() {
+            if builder.config.llvm_skip_rebuild {
+                builder.info(
+                    "Warning: \
+                    Using a potentially stale build of LLVM; \
+                    This may not behave well.",
+                );
+                return build_llvm_config;
+            }
+
             if let Some(llvm_commit) = llvm_info.sha() {
                 let done_contents = t!(fs::read(&done_stamp));