diff --git a/include/nana/config.hpp b/include/nana/config.hpp
index 806a0fd1..8f519e9b 100644
--- a/include/nana/config.hpp
+++ b/include/nana/config.hpp
@@ -20,40 +20,9 @@
 
 		#define NANA_WINDOWS	1
 
-		// compilers in Windows...
-
-		// MSVC++ versions
-		#if defined(_MSC_VER)
-			#define _SCL_SECURE_NO_WARNNGS
-			#define _CRT_SECURE_NO_DEPRECATE
-			#pragma warning(disable : 4996)
-
-			#if (_MSC_VER == 1900)
-					 // google: break any code that tries to use codecvt<char16_t> or codecvt<char32_t>.
-					 // google: It appears the C++ libs haven't been compiled with native char16_t/char32_t support.
-					 // google: Those definitions are for codecvt<wchar_t>::id, codecvt<unsigned short>::id and codecvt<char>::id respectively.
-					 // However, the codecvt<char16_t>::id and codecvt<char32_t>::id definitions aren't there, and indeed, if you look at locale0.cpp in the CRT source code you'll see they're not defined at all.
-					 // google: That's a known issue, tracked by an active bug (DevDiv#1060849). We were able to update the STL's headers in response to char16_t/char32_t, but we still need to update the separately compiled sources.
-				#define STD_CODECVT_NOT_SUPPORTED
-			#endif // _MSC_VER == 1900
-		#endif // _MSVC
-
 		// MINGW ...
 		#if defined(__MINGW32__) || defined(__MINGW64__) || defined(MINGW)
 			#define NANA_MINGW
-        	//#define STD_THREAD_NOT_SUPPORTED // don't works? why? where __GNUC__, etc. are set? by CLion ??
-			//Use this flag if MinGW version is older than 4.8.1
-			#if ((__GNUC__ == 4) && ((__GNUC_MINOR__ < 8) || (__GNUC_MINOR__ == 8 && __GNUC_PATCHLEVEL__ < 2)))
-			// don't works? why? where __GNUC__, etc. are set? by CLion ??
-				// ??
-				#define UNDEFINED_to_string
-
-				// https://github.com/meganz/mingw-std-threads
-				#define STD_THREAD_NOT_SUPPORTED
-				#define USE_github_com_meganz_mingw_std_threads
-
-			#endif
-
 		#endif // MINGW
 
 	// end Windows
@@ -85,24 +54,52 @@
 
 // compilers ...
 
-// temp
-//#define STD_NUMERIC_CONVERSIONS_NOT_SUPPORTED // don't works?
-//#define STD_CODECVT_NOT_SUPPORTED
+// MSVC++ versions
+#if defined(_MSC_VER)
+	#define _SCL_SECURE_NO_WARNNGS
+	#define _CRT_SECURE_NO_DEPRECATE
+	#pragma warning(disable : 4996)
 
-	// GCC ...
-	#if defined(__GNU__)
-		#if (__GNUC__ == 4) && (__GNUC_MINOR__ == 8) && (__GNUC_PATCHLEVEL__ <= 1)
-			// don't works?
+	#if (_MSC_VER == 1900)
+		// google: break any code that tries to use codecvt<char16_t> or codecvt<char32_t>.
+		// google: It appears the C++ libs haven't been compiled with native char16_t/char32_t support.
+		// google: Those definitions are for codecvt<wchar_t>::id, codecvt<unsigned short>::id and codecvt<char>::id respectively.
+		// However, the codecvt<char16_t>::id and codecvt<char32_t>::id definitions aren't there, and indeed, if you look at locale0.cpp in the CRT source code you'll see they're not defined at all.
+		// google: That's a known issue, tracked by an active bug (DevDiv#1060849). We were able to update the STL's headers in response to char16_t/char32_t, but we still need to update the separately compiled sources.
+		#define STD_CODECVT_NOT_SUPPORTED
+	#endif // _MSC_VER == 1900
+#endif // _MSVC
 
-			//GCC 4.7.0 does not implement the <codecvt> and codecvt_utfx classes  ??
-			#define STD_CODECVT_NOT_SUPPORTED
+//GCC
+#if defined(__GNUC__)
+	#if defined(__GLIBCPP__) || defined(__GLIBCXX__)
+		//<codecvt> is a known issue on libstdc++, it works on libc++
+		#define STD_CODECVT_NOT_SUPPORTED
+	#endif
 
-			//Some functions which are specified in 21.5 Numeric conversions in Strings library have not yet implemented
+	#if (__GNUC__ == 4)
+		#if ((__GNUC_MINOR__ < 8) || (__GNUC_MINOR__ == 8 && __GNUC_PATCHLEVEL__ < 1))
+			#define STD_THREAD_NOT_SUPPORTED
 
-			//Implement workarounds for GCC/MinGW which version is below 4.8.2
+			//boost.thread is preferred
+			//but if USE_github_com_meganz_mingw_std_threads is enabled,
+			//boost.thread will be replaced with meganz's mingw-std-threads.
+			// https://github.com/meganz/mingw-std-threads
+			//#define USE_github_com_meganz_mingw_std_threads
+		#endif
+
+		#if defined(NANA_MINGW)
+			//It's a known issue under MinGW
 			#define STD_NUMERIC_CONVERSIONS_NOT_SUPPORTED
 		#endif
-	#endif // GCC
+
+		#if ((__GNUC_MINOR__ < 8) || defined(NANA_MINGW))
+			#define STD_TO_STRING_NOT_SUPPORTED
+		#endif
+	#endif
+#endif
+
+
 // End compilers ...
 
 
diff --git a/include/nana/deploy.hpp b/include/nana/deploy.hpp
index e1f15d7d..30d87935 100644
--- a/include/nana/deploy.hpp
+++ b/include/nana/deploy.hpp
@@ -56,8 +56,23 @@ namespace std
 	//Workaround for no implemenation of std::stoull in MinGW.
 	unsigned long long stoull(const std::string&, std::size_t* pos = nullptr, int base = 10);
 	unsigned long long stoull(const std::wstring&, std::size_t* pos = nullptr, int base = 10);
+}
+#endif //STD_NUMERIC_CONVERSIONS_NOT_SUPPORTED
 
-	//Workaround for no implemenation of std::to_wstring in MinGW.
+#ifdef STD_TO_STRING_NOT_SUPPORTED
+namespace std
+{
+	//Workaround for no implemenation of std::to_string/std::to_wstring in MinGW.
+	std::string to_string(long double);
+	std::string to_string(double);
+	std::string to_string(unsigned);
+	std::string to_string(int);
+	std::string to_string(long);
+	std::string to_string(unsigned long);
+	std::string to_string(long long);
+	std::string to_string(unsigned long long);
+	std::string to_string(float);
+	
 	std::wstring to_wstring(long double);
 	std::wstring to_wstring(double);
 	std::wstring to_wstring(unsigned);
diff --git a/source/deploy.cpp b/source/deploy.cpp
index 817721ec..ce92982a 100644
--- a/source/deploy.cpp
+++ b/source/deploy.cpp
@@ -294,6 +294,74 @@ namespace std
 			*pos = (std::size_t)(end - ptr);
 		return result;
 	}
+}//end namespace std
+#endif //STD_NUMERIC_CONVERSIONS_NOT_SUPPORTED
+
+#ifdef STD_TO_STRING_NOT_SUPPORTED
+namespace std
+{
+	std::string to_string(double v)
+	{
+		std::stringstream ss;
+		ss << v;
+		return ss.str();
+	}
+
+	std::string to_string(long double v)
+	{
+		std::stringstream ss;
+		ss << v;
+		return ss.str();
+	}
+
+	std::string to_string(unsigned v)
+	{
+		std::stringstream ss;
+		ss << v;
+		return ss.str();
+	}
+
+	std::string to_string(int v)
+	{
+		std::stringstream ss;
+		ss << v;
+		return ss.str();
+	}
+
+	std::string to_string(long v)
+	{
+		std::stringstream ss;
+		ss << v;
+		return ss.str();
+	}
+
+	std::string to_string(unsigned long v)
+	{
+		std::stringstream ss;
+		ss << v;
+		return ss.str();
+	}
+
+	std::string to_string(long long v)
+	{
+		std::stringstream ss;
+		ss << v;
+		return ss.str();
+	}
+
+	std::string to_string(unsigned long long v)
+	{
+		std::stringstream ss;
+		ss << v;
+		return ss.str();
+	}
+
+	std::string to_string(float v)
+	{
+		std::stringstream ss;
+		ss << v;
+		return ss.str();
+	}
 
 	std::wstring to_wstring(double v)
 	{
diff --git a/source/gui/detail/linux_X11/bedrock.cpp b/source/gui/detail/linux_X11/bedrock.cpp
index 991cf8ef..5a69ab34 100644
--- a/source/gui/detail/linux_X11/bedrock.cpp
+++ b/source/gui/detail/linux_X11/bedrock.cpp
@@ -468,8 +468,8 @@ namespace detail
 		arg.right_button	= ((Button2Mask & mask_state) != 0) || (::nana::mouse::right_button == arg.button);
 		arg.mid_button		= ((Button3Mask & mask_state) != 0) || (::nana::mouse::middle_button == arg.button);
 		arg.alt		= ((Mod1Mask & mask_state) != 0);
-		arg.shift	= ги(ShiftMask & mask_state) != 0);
-		arg.ctrl	= ги(ControlMask & mask_state) != 0);
+		arg.shift	= ((ShiftMask & mask_state) != 0);
+		arg.ctrl	= ((ControlMask & mask_state) != 0);
 
 	}
 
@@ -833,7 +833,7 @@ namespace detail
 								msgwnd->flags.action = mouse_action::over;
 
 								click_arg.window_handle = reinterpret_cast<window>(msgwnd);
-								emit_drawer(&drawer::click, msgwnd, arg, &context);
+								emit_drawer(&drawer::click, msgwnd, click_arg, &context);
 							}
 						}
 					
diff --git a/source/gui/place.cpp b/source/gui/place.cpp
index da742af5..88ea8dd7 100644
--- a/source/gui/place.cpp
+++ b/source/gui/place.cpp
@@ -15,6 +15,7 @@
 #include <cmath>
 #include <map>
 #include <deque>
+#include <nana/deploy.hpp>
 #include <nana/gui/place.hpp>
 #include <nana/gui/programming_interface.hpp>
 #include <nana/gui/widgets/label.hpp>
@@ -95,13 +96,7 @@ namespace nana
 
 			std::string pos_str() const
 			{
-#ifdef UNDEFINED_to_string
-				std::stringstream ss;
-				ss<<pos();
-				return ss.str();
-#else
 				return std::to_string(pos());
-#endif // UNDEFINED_to_string
 			}
 
 			token read()