2 files changed, 7 insertions, 0 deletions
diff --git a/library/profiler_builtins/build.rs b/library/profiler_builtins/build.rs
index 1b1f11798..d14d0b822 100644
--- a/library/profiler_builtins/build.rs
+++ b/library/profiler_builtins/build.rs
@@ -6,6 +6,12 @@ use std::env;
 use std::path::Path;
 
 fn main() {
+    println!("cargo:rerun-if-env-changed=LLVM_PROFILER_RT_LIB");
+    if let Ok(rt) = env::var("LLVM_PROFILER_RT_LIB") {
+        println!("cargo:rustc-link-lib=static:+verbatim={rt}");
+        return;
+    }
+
     let target = env::var("TARGET").expect("TARGET was not set");
     let cfg = &mut cc::Build::new();
 
diff --git a/library/profiler_builtins/src/lib.rs b/library/profiler_builtins/src/lib.rs
index 0c83bcee0..a81d0a635 100644
--- a/library/profiler_builtins/src/lib.rs
+++ b/library/profiler_builtins/src/lib.rs
@@ -7,4 +7,5 @@
     issue = "none"
 )]
 #![allow(unused_features)]
+#![cfg_attr(not(bootstrap), allow(internal_features))]
 #![feature(staged_api)]