Rollup merge of #61698 - davidtwco:ice-const-generic-length, r=varkor

[rust.git] / src / librustc / build.rs

diff --git a/src/librustc/build.rs b/src/librustc/build.rs
index 4df5f0e64050c79290121b030e6bc8b9afdf1b0d..af7723aea34e466edfd582741d409baec623c5ea 100644 (file)
--- a/src/librustc/build.rs
+++ b/src/librustc/build.rs
@@ -1,15 +1,12 @@
-// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
+use std::env;
 
 fn main() {
     println!("cargo:rerun-if-changed=build.rs");
     println!("cargo:rerun-if-env-changed=CFG_LIBDIR_RELATIVE");
     println!("cargo:rerun-if-env-changed=CFG_COMPILER_HOST_TRIPLE");
+    println!("cargo:rerun-if-env-changed=RUSTC_VERIFY_LLVM_IR");
+
+    if env::var_os("RUSTC_VERIFY_LLVM_IR").is_some() {
+        println!("cargo:rustc-cfg=always_verify_llvm_ir");
+    }
 }