From d571910f4dd057d26c7c2f483a4b3a813e292d00 Mon Sep 17 00:00:00 2001
From: bjorn3 <bjorn3@users.noreply.github.com>
Date: Sat, 19 Jun 2021 14:07:56 +0200
Subject: [PATCH] Give an error when attempting to build for MSVC

---
 y.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/y.rs b/y.rs
index 27ab44f5870..55457745d25 100755
--- a/y.rs
+++ b/y.rs
@@ -127,6 +127,14 @@ fn main() {
         host_triple.clone()
     };
 
+    if target_triple.ends_with("-msvc") {
+        eprintln!("The MSVC toolchain is not yet supported by rustc_codegen_cranelift.");
+        eprintln!("Switch to the MinGW toolchain for Windows support.");
+        eprintln!("Hint: You can use `rustup set default-host x86_64-pc-windows-gnu` to");
+        eprintln!("set the global default target to MinGW");
+        process::exit(1);
+    }
+
     let cg_clif_dylib = build_backend::build_backend(channel);
     build_sysroot::build_sysroot(
         channel,