From b42e551285541a1634b0e5fd731109f74a4f9ef7 Mon Sep 17 00:00:00 2001
From: Brian Anderson <banderson@mozilla.com>
Date: Sun, 16 Oct 2011 02:36:42 -0700
Subject: [PATCH] Only link librt on linux

---
 src/comp/back/link.rs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/comp/back/link.rs b/src/comp/back/link.rs
index 2162e67724ee..8dd812f87429 100644
--- a/src/comp/back/link.rs
+++ b/src/comp/back/link.rs
@@ -582,7 +582,14 @@ fn link_binary(sess: session::session,
         gcc_args += ["-lm", main];
     }
 
-    gcc_args += ["-lrustrt", "-lrt"];
+    // On linux librt is an indirect dependency via rustrt,
+    // and binutils 2.22+ won't add it automatically
+    if sess.get_targ_cfg().os == session::os_linux {
+        gcc_args += ["-lrt"];
+    }
+
+    // Always want the runtime linked in
+    gcc_args += ["-lrustrt"];
 
     gcc_args += rpath::get_rpath_flags(sess, saved_out_filename);