From ab65cb3c6779f1d59ea2022c4d9d6effca2c614d Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Sun, 5 Jul 2020 20:01:12 +0200
Subject: [PATCH] support relative XARGO_RUST_SRC

---
 cargo-miri/bin.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/cargo-miri/bin.rs b/cargo-miri/bin.rs
index 197552a4b12..68f25b411a9 100644
--- a/cargo-miri/bin.rs
+++ b/cargo-miri/bin.rs
@@ -257,7 +257,10 @@ fn setup(subcommand: MiriCommand) {
 
     // Determine where the rust sources are located.  `XARGO_RUST_SRC` env var trumps everything.
     let rust_src = match std::env::var_os("XARGO_RUST_SRC") {
-        Some(val) => PathBuf::from(val),
+        Some(val) => {
+            let val = PathBuf::from(val);
+            val.canonicalize().unwrap_or(val)
+        }
         None => {
             // Check for `rust-src` rustup component.
             let sysroot = miri()