From f3dda17469bd70feaf6a1d979cdc65dd450f8fcb Mon Sep 17 00:00:00 2001
From: Tim Neumann <mail@timnn.me>
Date: Mon, 17 Apr 2017 10:24:33 +0200
Subject: FIN: Compile LLVM with -fno-omit-frame-pointer on 32bit MinGW builds

to work around an apparently bad optimization.
---
 src/bootstrap/lib.rs | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/bootstrap')

diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 84254d7d6ae..27d4e309a75 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -874,6 +874,13 @@ impl Build {
         if target.contains("apple-darwin") {
             base.push("-stdlib=libc++".into());
         }
+
+        // Work around an apparently bad MinGW / GCC optimization,
+        // See: http://lists.llvm.org/pipermail/cfe-dev/2016-December/051980.html
+        // See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78936
+        if target == "i686-pc-windows-gnu" {
+            base.push("-fno-omit-frame-pointer".into());
+        }
         return base
     }
 
-- 
cgit 1.4.1-3-g733a5