Update backend.cpp (#3900)

src/common/logging/backend.cpp

@@ -98,6 +98,7 @@ private:
     std::size_t bytes_written = 0;
 };
 
+#ifdef _WIN32
 /**
  * Backend that writes to Visual Studio's output window
  */
@@ -108,15 +109,14 @@ public:
     ~DebuggerBackend() = default;
 
     void Write(const Entry& entry) {
-#ifdef _WIN32
         ::OutputDebugStringW(UTF8ToUTF16W(FormatLogMessage(entry).append(1, '\n')).c_str());
-#endif
     }
 
     void Flush() {}
 
     void EnableForStacktrace() {}
 };
+#endif
 
 bool initialization_in_progress_suppress_logging = true;
 
@@ -268,7 +268,9 @@ private:
     }
 
     void ForEachBackend(auto lambda) {
-        // lambda(debugger_backend);
+#ifdef _WIN32
+        lambda(debugger_backend);
+#endif
         lambda(color_console_backend);
         lambda(file_backend);
     }
@@ -281,7 +283,9 @@ private:
     static inline bool should_append{false};
 
     Filter filter;
+#ifdef _WIN32
     DebuggerBackend debugger_backend{};
+#endif
     ColorConsoleBackend color_console_backend{};
     FileBackend file_backend;