From 86acb09273275a0a045f48bd43cb60eb0a512ff1 Mon Sep 17 00:00:00 2001
From: varkor <github@varkor.com>
Date: Thu, 19 Apr 2018 00:09:41 +0100
Subject: [PATCH] Add rerun-if-env-changed=RUST_CHECK to librustc_llvm

---
 src/librustc_llvm/build.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/librustc_llvm/build.rs b/src/librustc_llvm/build.rs
index d09a3e8b9dad2..1619637b827df 100644
--- a/src/librustc_llvm/build.rs
+++ b/src/librustc_llvm/build.rs
@@ -30,6 +30,7 @@ fn detect_llvm_link() -> (&'static str, &'static str) {
 fn main() {
     if env::var_os("RUST_CHECK").is_some() {
         // If we're just running `check`, there's no need for LLVM to be built.
+        println!("cargo:rerun-if-env-changed=RUST_CHECK");
         return;
     }