From 51f46e2d2281dce75a8e4d46c0ed55f2ae3c4e33 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Sat, 6 Apr 2024 10:24:01 -0700
Subject: [PATCH] Apply RUSTC_WRAPPER

---
 build/build.rs | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/build/build.rs b/build/build.rs
index 0a45f4c..589bc93 100644
--- a/build/build.rs
+++ b/build/build.rs
@@ -9,6 +9,7 @@ mod rustc;
 use std::env;
 use std::ffi::OsString;
 use std::fs;
+use std::iter;
 use std::path::Path;
 use std::process::{self, Command};
 
@@ -16,10 +17,14 @@ fn main() {
     println!("cargo:rerun-if-changed=build/build.rs");
 
     let rustc = env::var_os("RUSTC").unwrap_or_else(|| OsString::from("rustc"));
+    let rustc_wrapper = env::var_os("RUSTC_WRAPPER").filter(|wrapper| !wrapper.is_empty());
+    let wrapped_rustc = rustc_wrapper.iter().chain(iter::once(&rustc));
 
     let mut is_clippy_driver = false;
     let version = loop {
-        let mut command = Command::new(&rustc);
+        let mut wrapped_rustc = wrapped_rustc.clone();
+        let mut command = Command::new(wrapped_rustc.next().unwrap());
+        command.args(wrapped_rustc);
         if is_clippy_driver {
             command.arg("--rustc");
         }