-std::ostream &operator<<(std::ostream &, const Backtrace &);
-std::ostream &operator<<(std::ostream &, const Backtrace::StackFrame &);
+MSPCORE_API std::ostream &operator<<(std::ostream &, const Backtrace &);
+MSPCORE_API std::ostream &operator<<(std::ostream &, const Backtrace::StackFrame &);