From e440bfb992b5dbc6984d129d2b101147a9f02cd3 Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Wed, 27 Apr 2016 09:18:38 -0700
Subject: [PATCH] Pass -m32/-march=pentium for i586 linux

---
 src/lib.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/lib.rs b/src/lib.rs
index d0fbb65..a985793 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -431,7 +431,7 @@ impl Config {
         if target.contains("-ios") {
             self.ios_flags(&mut cmd);
         } else if !msvc {
-            if target.contains("i686") {
+            if target.contains("i686") || target.contains("i586") {
                 cmd.args.push("-m32".into());
             } else if target.contains("x86_64") || target.contains("powerpc64") {
                 cmd.args.push("-m64".into());
@@ -454,6 +454,9 @@ impl Config {
                 cmd.args.push("-march=armv6".into());
                 cmd.args.push("-marm".into());
             }
+            if target.starts_with("i586-unknown-linux-") {
+                cmd.args.push("-march=pentium".into());
+            }
         }
 
         if self.cpp && !msvc {