fix attempt

build/Jamfile.v2

@@ -180,4 +180,5 @@ lib boost_stacktrace_from_exception
   : # usage-requirements
     #<link>shared:<define>BOOST_STACKTRACE_DYN_LINK=1
     <define>BOOST_STACKTRACE_NO_LIB=1
+    <define>BOOST_STACKTRACE_LINKED_WITH_FROM_EXCEPTION=1
   ;

include/boost/stacktrace/stacktrace.hpp

@@ -37,15 +37,18 @@
 
 extern "C" {
 
-//#if defined(BOOST_STACKTRACE_LINK) && defined(BOOST_STACKTRACE_DYN_LINK)
-BOOST_SYMBOL_EXPORT
-//#endif
-inline void* boost_stacktrace_impl_return_nullptr() { return nullptr; }
 const char* boost_stacktrace_impl_current_exception_stacktrace();
 bool* boost_stacktrace_impl_ref_capture_stacktraces_at_throw();
 
 }
 
+#ifndef BOOST_STACKTRACE_LINKED_WITH_FROM_EXCEPTION
+
+extern "C" {
+BOOST_SYMBOL_EXPORT
+inline void* boost_stacktrace_impl_return_nullptr() { return nullptr; }
+}
+
 #ifdef _M_IX86
 #   pragma comment(linker, "/ALTERNATENAME:_boost_stacktrace_impl_current_exception_stacktrace=_boost_stacktrace_impl_return_nullptr")
 #   pragma comment(linker, "/ALTERNATENAME:_boost_stacktrace_impl_ref_capture_stacktraces_at_throw=_boost_stacktrace_impl_return_nullptr")
@@ -54,6 +57,8 @@ bool* boost_stacktrace_impl_ref_capture_stacktraces_at_throw();
 #   pragma comment(linker, "/ALTERNATENAME:boost_stacktrace_impl_ref_capture_stacktraces_at_throw=boost_stacktrace_impl_return_nullptr")
 #endif
 
+#endif  // #ifndef BOOST_STACKTRACE_LINKED_WITH_FROM_EXCEPTION
+
 #endif
 
 namespace boost { namespace stacktrace {