From 8b6613e592824b30d48a9252604172abfa33c5f2 Mon Sep 17 00:00:00 2001
From: Dmitry Marakasov <amdmi3@amdmi3.ru>
Date: Tue, 1 Mar 2016 13:54:12 +0300
Subject: [PATCH] Only check for BOOST_GCC when it's defined

This fixes warnings with clang:

/usr/local/include/boost/tuple/detail/tuple_basic.hpp:44:5: warning: 'BOOST_GCC' is not defined, evaluates to 0 [-Wundef]
---
 include/boost/tuple/detail/tuple_basic.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/boost/tuple/detail/tuple_basic.hpp b/include/boost/tuple/detail/tuple_basic.hpp
index 9a3b34e..a688309 100644
--- a/include/boost/tuple/detail/tuple_basic.hpp
+++ b/include/boost/tuple/detail/tuple_basic.hpp
@@ -41,7 +41,7 @@
 
 #include "boost/detail/workaround.hpp" // needed for BOOST_WORKAROUND
 
-#if BOOST_GCC >= 40700
+#if defined(BOOST_GCC) && (BOOST_GCC >= 40700)
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-local-typedefs"
 #endif
@@ -979,7 +979,7 @@ inline void swap(tuple<T0, T1, T2, T3, T4, T5, T6, T7, T8, T9>& lhs,
 } // end of namespace boost
 
 
-#if BOOST_GCC >= 40700
+#if defined(BOOST_GCC) && (BOOST_GCC >= 40700)
 #pragma GCC diagnostic pop
 #endif