Enable usage of MSVC specific thread local storage attributes

build/has_windbg_cached.cpp

@@ -4,13 +4,18 @@
 // accompanying file LICENSE_1_0.txt or copy at
 // http://www.boost.org/LICENSE_1_0.txt)
 
+#include <boost/config.hpp>
 #include <cstring>
 #include <windows.h>
 #include "dbgeng.h"
 
 int foo() {
+#ifndef BOOST_NO_CXX11_THREAD_LOCAL
     static thread_local int i = 0;
-    
+#else
+    static __declspec(thread) int i = 0;
+#endif
+
     return i;
 }
 

include/boost/stacktrace/detail/frame_msvc.ipp

@@ -166,8 +166,13 @@ public:
     static com_holder< ::IDebugSymbols>& get_thread_local_debug_inst() BOOST_NOEXCEPT {
         // [class.mfct]: A static local variable or local type in a member function always refers to the same entity, whether
         // or not the member function is inline.
+#ifndef BOOST_NO_CXX11_THREAD_LOCAL
         static thread_local boost::stacktrace::detail::com_global_initer com;
         static thread_local com_holder< ::IDebugSymbols> idebug(com);
+#else
+        static __declspec(thread) boost::stacktrace::detail::com_global_initer com;
+        static __declspec(thread) com_holder< ::IDebugSymbols> idebug(com);
+#endif
 
         if (!idebug.is_inited()) {
             try_init_com(idebug, com);