Boost.ASIO: potential fix for top_E shlib segfaults

src/boostAsioLinkageFix.cpp

@@ -0,0 +1,18 @@
+#include <boost/asio/detail/call_stack.hpp>
+#include <boost/asio/detail/thread_context.hpp>
+#include <boost/asio/detail/tss_ptr.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+/** Single translation-unit definition for Boost.Asio call_stack TLS.
+ * Other TUs include boostAsioLinkageFix.h first and use extern template.
+ */
+template
+tss_ptr<call_stack<thread_context, thread_info_base>::context>
+call_stack<thread_context, thread_info_base>::top_;
+
+} // namespace detail
+} // namespace asio
+} // namespace boost