From 33086672fa30ef627cbb69896b79ad6c936c2f2f Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Mon, 16 Jul 2018 16:37:35 -0700
Subject: [PATCH] Don't build multc3 on AArch64 MSVC

Apparently it doesn't compile due to an odd compiler error! This intrinsic has
to do with complex arithmetic anyway and we shouldn't need it.
---
 library/compiler-builtins/build.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/library/compiler-builtins/build.rs b/library/compiler-builtins/build.rs
index a7091d541f4c..cdcbfe24cd73 100644
--- a/library/compiler-builtins/build.rs
+++ b/library/compiler-builtins/build.rs
@@ -415,11 +415,14 @@ mod c {
                     "floatsitf.c",
                     "floatunditf.c",
                     "floatunsitf.c",
-                    "multc3.c",
                     "trunctfdf2.c",
                     "trunctfsf2.c",
                 ],
             );
+
+            if target_os != "windows" {
+                sources.extend(&["multc3.c"]);
+            }
         }
 
         // Remove the assembly implementations that won't compile for the target