--- old/exception.hpp	2011-06-04 02:50:48.000000000 +0200
+++ new/exception.hpp	2011-06-14 11:09:11.609375000 +0200
@@ -132,7 +132,17 @@
             }
         };
 
+#if defined(__GNUC__)
+# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
+#  pragma GCC visibility push (default)
+# endif
+#endif
     class exception;
+#if defined(__GNUC__)
+# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
+#  pragma GCC visibility pop
+# endif
+#endif
 
     template <class T>
     class shared_ptr;