From 41e2470d21ad9996507a86fe8090c78012e6f00d Mon Sep 17 00:00:00 2001
From: Andrey Semashev <andrey.semashev@gmail.com>
Date: Tue, 24 Sep 2013 12:56:50 +0000
Subject: [PATCH] Enabled #pragma once for all compilers that support it, not
 only MSVC.

[SVN r85866]
---
 include/boost/detail/interlocked.hpp | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/include/boost/detail/interlocked.hpp b/include/boost/detail/interlocked.hpp
index 5130259..c2b3d2e 100644
--- a/include/boost/detail/interlocked.hpp
+++ b/include/boost/detail/interlocked.hpp
@@ -1,12 +1,6 @@
 #ifndef BOOST_DETAIL_INTERLOCKED_HPP_INCLUDED
 #define BOOST_DETAIL_INTERLOCKED_HPP_INCLUDED
 
-// MS compatible compilers support #pragma once
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
 //
 //  boost/detail/interlocked.hpp
 //
@@ -19,6 +13,11 @@
 
 #include <boost/config.hpp>
 
+// MS compatible compilers support #pragma once
+#ifdef BOOST_HAS_PRAGMA_ONCE
+#pragma once
+#endif
+
 #if defined( BOOST_USE_WINDOWS_H )
 
 # include <windows.h>