Simplify CMake file and config.h

source/gui/animation.cpp

@@ -21,7 +21,7 @@
 #include <map>
 #include <algorithm>
 
-#if defined(NANA_MINGW) && defined(STD_THREAD_NOT_SUPPORTED)
+#if defined(STD_THREAD_NOT_SUPPORTED)
     #include <nana/std_thread.hpp>
     #include <nana/std_mutex.hpp>
     #include <nana/std_condition_variable.hpp>
@@ -29,7 +29,7 @@
     #include <mutex>
     #include <condition_variable>
     #include <thread>
-#endif //NANA_MINGW
+#endif // STD_THREAD_NOT_SUPPORTED
 
 namespace nana
 {

source/gui/detail/native_window_interface.cpp

@@ -14,7 +14,7 @@
 #include <nana/gui/detail/native_window_interface.hpp>
 #include <nana/gui/screen.hpp>
 #if defined(NANA_WINDOWS)
-	#if defined(NANA_MINGW) && defined(STD_THREAD_NOT_SUPPORTED)
+	#if defined(STD_THREAD_NOT_SUPPORTED)
         #include <nana/std_mutex.hpp>
     #else
         #include <mutex>

source/gui/notifier.cpp

@@ -20,7 +20,7 @@
 #include <unordered_map>
 #include <unordered_set>
 
-#if defined(NANA_MINGW) && defined(STD_THREAD_NOT_SUPPORTED)
+#if defined(STD_THREAD_NOT_SUPPORTED)
 #include <nana/std_mutex.hpp>
 #else
 #include <mutex>

source/gui/place.cpp

@@ -95,13 +95,13 @@ namespace nana
 
 			std::string pos_str() const
 			{
-#ifdef NANA_MINGW
+#ifdef UNDEFINED_to_string
 				std::stringstream ss;
 				ss<<pos();
 				return ss.str();
 #else
 				return std::to_string(pos());
-#endif // NANA_MINGW
+#endif // UNDEFINED_to_string
 			}
 
 			token read()

source/gui/timer.cpp

@@ -19,7 +19,7 @@
 #include <map>
 #include <memory>
 
-#if defined(NANA_MINGW) && defined(STD_THREAD_NOT_SUPPORTED)
+#if defined(STD_THREAD_NOT_SUPPORTED)
     #include <nana/std_mutex.hpp>
 #else
     #include <mutex>