From 16ad9777b8afd3991b4501e602a04e5e40214b56 Mon Sep 17 00:00:00 2001
From: Ralf Jung <post@ralfj.de>
Date: Thu, 25 Apr 2019 18:47:36 +0200
Subject: [PATCH] when testing Miri, compile libstd for Miri

---
 src/bootstrap/bin/rustc.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/bootstrap/bin/rustc.rs b/src/bootstrap/bin/rustc.rs
index a8f0d24ce63db..383b3a3cf0ad5 100644
--- a/src/bootstrap/bin/rustc.rs
+++ b/src/bootstrap/bin/rustc.rs
@@ -262,6 +262,7 @@ fn main() {
             // The flags here should be kept in sync with `add_miri_default_args`
             // in miri's `src/lib.rs`.
             cmd.arg("-Zalways-encode-mir");
+            cmd.arg("--cfg=miri");
             // These options are preferred by miri, to be able to perform better validation,
             // but the bootstrap compiler might not understand them.
             if stage != "0" {