From f52e2fe315ec471f6a15c850749c73b210cecb99 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Va=CC=81clav=20Slavi=CC=81k?= <vaclav@slavik.io>
Date: Sat, 10 Oct 2015 16:44:52 +0200
Subject: [PATCH] Use default visibility for exception_detail::clone_impl<>

When building code with hidden visibility on ELF, exception classes must
explicitly use the default visibility for catching to work across shared
objects; the same must be done for all their base classes. While other
classes in the boost::exception_detail namespace had visibility adjusted
accordingly, clone_impl<T> didn't, so remedy that.
---
 include/boost/exception/exception.hpp | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/boost/exception/exception.hpp b/include/boost/exception/exception.hpp
index d762cf8..1f2bd9c 100644
--- a/include/boost/exception/exception.hpp
+++ b/include/boost/exception/exception.hpp
@@ -432,6 +432,11 @@ boost
             {
             }
 
+#if defined(__GNUC__)
+# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
+#  pragma GCC visibility push (default)
+# endif
+#endif
         template <class T>
         class
         clone_impl:
@@ -473,6 +478,11 @@ boost
                 }
             };
         }
+#if defined(__GNUC__)
+# if (__GNUC__ == 4 && __GNUC_MINOR__ >= 1) || (__GNUC__ > 4)
+#  pragma GCC visibility pop
+# endif
+#endif
 
     template <class T>
     inline