diff -up boost_1_57_0/boost/mpl/print.hpp\~ boost_1_57_0/boost/mpl/print.hpp
--- boost_1_57_0/boost/mpl/print.hpp~	2014-07-09 23:12:31.000000000 +0200
+++ boost_1_57_0/boost/mpl/print.hpp	2015-01-20 12:44:59.621400948 +0100
@@ -52,16 +52,15 @@ struct print
     enum { n = sizeof(T) + -1 };
 #elif defined(__MWERKS__)
     void f(int);
-#else 
-    enum {
-        n =
-# if defined(__EDG_VERSION__)
-           aux::dependent_unsigned<T>::value > -1
-# else 
-           sizeof(T) > -1
-# endif 
-        };
-#endif 
+#elif defined(__EDG_VERSION__)
+    enum { n = aux::dependent_unsigned<T>::value > -1 };
+#elif defined(BOOST_GCC)
+    enum { n1 };
+    enum { n2 };
+    enum { n = n1 != n2 };
+#else
+    enum { n = sizeof(T) > -1 };
+#endif
 };
 
 #if defined(BOOST_MSVC)

Diff finished.  Tue Jan 20 12:45:03 2015