1 files changed, 6 insertions, 4 deletions
diff --git a/compiler/rustc_codegen_llvm/src/lib.rs b/compiler/rustc_codegen_llvm/src/lib.rs
index 43164390a1c..6a303e1e602 100644
--- a/compiler/rustc_codegen_llvm/src/lib.rs
+++ b/compiler/rustc_codegen_llvm/src/lib.rs
@@ -6,6 +6,7 @@
 
 // tidy-alphabetical-start
 #![allow(internal_features)]
+#![cfg_attr(bootstrap, feature(unsafe_extern_blocks))]
 #![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
 #![doc(rust_logo)]
 #![feature(assert_matches)]
@@ -16,6 +17,7 @@
 #![feature(iter_intersperse)]
 #![feature(let_chains)]
 #![feature(rustdoc_internals)]
+#![warn(unreachable_pub)]
 // tidy-alphabetical-end
 
 use std::any::Any;
@@ -45,11 +47,11 @@ use rustc_session::Session;
 use rustc_span::symbol::Symbol;
 
 mod back {
-    pub mod archive;
-    pub mod lto;
-    pub mod owned_target_machine;
+    pub(crate) mod archive;
+    pub(crate) mod lto;
+    pub(crate) mod owned_target_machine;
     mod profiling;
-    pub mod write;
+    pub(crate) mod write;
 }
 
 mod abi;