From 57950a20840d43bec9e331be3cfc6f7c3a52673a Mon Sep 17 00:00:00 2001
From: Mark Rousskov <mark.simulacrum@gmail.com>
Date: Tue, 17 Nov 2020 16:00:41 -0500
Subject: [PATCH] Ignore failures of RLS on aarch64 Windows

---
 src/bootstrap/dist.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/bootstrap/dist.rs b/src/bootstrap/dist.rs
index 0a79d09b27fe..0745260e7e70 100644
--- a/src/bootstrap/dist.rs
+++ b/src/bootstrap/dist.rs
@@ -1021,7 +1021,13 @@ impl Step for Rls {
         let rls = builder
             .ensure(tool::Rls { compiler, target, extra_features: Vec::new() })
             .or_else(|| {
-                missing_tool("RLS", builder.build.config.missing_tools);
+                // We ignore failure on aarch64 Windows because RLS currently
+                // fails to build, due to winapi 0.2 not supporting aarch64.
+                missing_tool(
+                    "RLS",
+                    builder.build.config.missing_tools
+                        || (target.triple.contains("aarch64") && target.triple.contains("windows")),
+                );
                 None
             })?;