From e3a1498355121b45ae8e9891c0950db607afe170 Mon Sep 17 00:00:00 2001
From: "Vicente J. Botet Escriba" <vicente.botet@wanadoo.fr>
Date: Sun, 29 Sep 2013 14:41:01 +0000
Subject: [PATCH] Thread: provide physical_concurrency conditionally.

[SVN r86002]
---
 include/boost/thread/scoped_thread.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/boost/thread/scoped_thread.hpp b/include/boost/thread/scoped_thread.hpp
index d7fbabd8..6fa6dd69 100644
--- a/include/boost/thread/scoped_thread.hpp
+++ b/include/boost/thread/scoped_thread.hpp
@@ -266,10 +266,12 @@ namespace boost
       return thread::hardware_concurrency();
     }
 
+#ifdef BOOST_THREAD_PROVIDES_PHYSICAL_CONCURRENCY
     static unsigned physical_concurrency() BOOST_NOEXCEPT
     {
       return thread::physical_concurrency();
     }
+#endif
   };
 
   /**