Added SPDLOG_DISABLE_DEFAULT_LOGGER option to tweakme.h

example/example.cpp

@@ -28,7 +28,6 @@ void clone_example();
 
 int main(int, char *[])
 {
-
     spdlog::info("Welcome to spdlog version {}.{}.{} !", SPDLOG_VER_MAJOR, SPDLOG_VER_MINOR, SPDLOG_VER_PATCH);
     spdlog::warn("Easy padding in numbers like {:08d}", 12);
     spdlog::critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);

include/spdlog/details/registry.h

@@ -215,15 +215,20 @@ private:
     registry()
         : formatter_(new pattern_formatter("%+"))
     {
-        // create default logger (stdout_color_mt).
+
+#ifndef SPDLOG_DISABLE_DEFAULT_LOGGER
+        // create default logger (ansicolor_stdout_sink_mt or wincolor_stdout_sink_mt in windows).
 #ifdef _WIN32
         auto color_sink = std::make_shared<sinks::wincolor_stdout_sink_mt>();
 #else
         auto color_sink = std::make_shared<sinks::ansicolor_stdout_sink_mt>();
 #endif
-        SPDLOG_CONSTEXPR const char *default_logger_name = "";
+
+        const char *default_logger_name = "";
         default_logger_ = std::make_shared<spdlog::logger>(default_logger_name, std::move(color_sink));
         loggers_[default_logger_name] = default_logger_;
+
+#endif // SPDLOG_DISABLE_DEFAULT_LOGGER
     }
 
     ~registry() = default;

include/spdlog/tweakme.h

@@ -121,3 +121,11 @@
 // #define SPDLOG_LEVEL_NAMES { "MY TRACE", "MY DEBUG", "MY INFO", "MY WARNING",
 // "MY ERROR", "MY CRITICAL", "OFF" }
 ///////////////////////////////////////////////////////////////////////////////
+
+
+///////////////////////////////////////////////////////////////////////////////
+// Uncomment to disable default logger creation.
+// This might save some small initialization time
+//
+// #define SPDLOG_DISABLE_DEFAULT_LOGGER
+///////////////////////////////////////////////////////////////////////////////