--- a/tools/clang/lib/Driver/ToolChains.cpp	2014-08-27 22:07:31.000000000 +0200
+++ b/tools/clang/lib/Driver/ToolChains.cpp	2014-09-08 02:51:38.197987523 +0200
@@ -1249,8 +1249,13 @@
     Prefixes.push_back(D.InstalledDir + "/..");
 
     // And finally in /usr.
-    if (D.SysRoot.empty())
+    if (D.SysRoot.empty()) {
+      Prefixes.push_back("/opt/rh/devtoolset-3/root/usr");
+      Prefixes.push_back("/opt/rh/devtoolset-2/root/usr");
+      Prefixes.push_back("/opt/rh/devtoolset-1.1/root/usr");
+      Prefixes.push_back("/opt/rh/devtoolset-1.0/root/usr");
       Prefixes.push_back("/usr");
+    }
   }
 
   // Loop over the various components which exist and select the best GCC