diff --git a/include/nana/config.hpp b/include/nana/config.hpp
index ae11279d..084bc1e0 100644
--- a/include/nana/config.hpp
+++ b/include/nana/config.hpp
@@ -109,7 +109,7 @@
 #endif
 
 #if !defined(STOP_VERBOSE_PREPROCESSOR)
-#define STOP_VERBOSE_PREPROCESSOR
+//#define STOP_VERBOSE_PREPROCESSOR
 #endif
 
 #endif  // NANA_IGNORE_CONFIG
diff --git a/include/nana/filesystem/filesystem_selector.hpp b/include/nana/filesystem/filesystem_selector.hpp
index 5a8eac29..338c1a6f 100644
--- a/include/nana/filesystem/filesystem_selector.hpp
+++ b/include/nana/filesystem/filesystem_selector.hpp
@@ -46,8 +46,8 @@ namespace std {
 #       else
 			using namespace nana::experimental::filesystem::v1;
 #       endif
-#define NANA_USING_NANA_FILESYSTEM  true
-		} // filesystem
+#undef  NANA_USING_NANA_FILESYSTEM 
+#define NANA_USING_NANA_FILESYSTEM  true		} // filesystem
 	} // experimental
 } // std
 
@@ -60,6 +60,7 @@ namespace std {
 	namespace experimental {
 		namespace filesystem {
                   using namespace boost::filesystem;
+#undef  NANA_USING_BOOST_FILESYSTEM
 #define NANA_USING_BOOST_FILESYSTEM true
 		} // filesystem
 	} // experimental
@@ -67,6 +68,7 @@ namespace std {
 
 #else
 #    include <experimental/filesystem>
+#undef NANA_USING_STD_FILESYSTEM 
 #define NANA_USING_STD_FILESYSTEM true
 #endif
 
diff --git a/include/nana/verbose_preprocessor.hpp b/include/nana/verbose_preprocessor.hpp
index b19278b1..56c5f328 100644
--- a/include/nana/verbose_preprocessor.hpp
+++ b/include/nana/verbose_preprocessor.hpp
@@ -32,57 +32,99 @@
 
     #define STRING2(x) #x
 	#define STRING(x) STRING2(x)
-    #define SHOW_VALUE(x)  "\n x=" STRING2(x) 
+    #define SHOW_VALUE(x) " " #x "  =  " STRING2(x) 
 
-	#pragma message ( "\n ---> SVerbose preprocessor \nVERBOSE_PREPROCESSOR=" STRING(VERBOSE_PREPROCESSOR)" , \n STOP_VERBOSE_PREPROCESSOR=" STRING(STOP_VERBOSE_PREPROCESSOR)  )
+	#pragma message ( "\n -----> Verbose preprocessor"  )
+	#pragma message (  SHOW_VALUE(VERBOSE_PREPROCESSOR)  )
+	#pragma message (  SHOW_VALUE(STOP_VERBOSE_PREPROCESSOR)  )
 
-	#pragma message ( "\n ---> OS: \nWindows: \n _WIN32=" STRING(_WIN32) ", \n __WIN32__ =" STRING(__WIN32__) " , \n WIN32=" STRING(WIN32)" , \n NANA_WINDOWS=" STRING(NANA_WINDOWS)   )
+	#pragma message ( "\n -----> OS: \n   --Windows: "    )
+    #pragma message (  SHOW_VALUE(_WIN32)  )
+    #pragma message (  SHOW_VALUE(__WIN32__)  )
+    #pragma message (  SHOW_VALUE(WIN32)  )
+	#pragma message (  SHOW_VALUE(NANA_WINDOWS)  )
 
-	#pragma message ( "\nNIX: \n NANA_LINUX=" STRING(NANA_LINUX) ", \n  NANA_POSIX=" STRING(NANA_POSIX) " , \n  NANA_X11=" STRING(NANA_X11) " , \n  APPLE=" STRING(APPLE) " , \n NANA_MACOS =" STRING(NANA_MACOS) " , \n NANA_IGNORE_CONF=" STRING(NANA_IGNORE_CONF) )
+	#pragma message ( "\n   ---NIX: "  )
+	#pragma message (  SHOW_VALUE(NANA_LINUX)  )
+	#pragma message (  SHOW_VALUE(NANA_POSIX)  )
+	#pragma message (  SHOW_VALUE(NANA_X11)  )
+	#pragma message (  SHOW_VALUE(APPLE)  )
+	#pragma message (  SHOW_VALUE(NANA_IGNORE_CONF)  )
 
-	#pragma message ( "\n ---> Compilers: \n MinGW: \n __MINGW32__=" STRING(__MINGW32__) ", \n __MINGW64__=" STRING(__MINGW64__) " , \n MINGW=" STRING(MINGW) )
 
-	#pragma message ( "\nMSC: \n _MSC_VER=" STRING(_MSC_VER) ", \n _MSC_FULL_VER=" STRING(_MSC_FULL_VER ) )
+	#pragma message ( "\n -----> Compilers: \n  MinGW: "  )
+	#pragma message (  SHOW_VALUE(__MINGW32__)  )
+	#pragma message (  SHOW_VALUE(__MINGW64__)  )
+	#pragma message (  SHOW_VALUE(MINGW)  )
 
-	#pragma message ( "\nGNU: \n __GNUC__=" STRING(__GNUC__) ", \n __GNUC_MINOR__=" STRING(__GNUC_MINOR__) " , \n __GNUC_PATCHLEVEL__=" STRING(__GNUC_PATCHLEVEL__) )
+	#pragma message ( "\n  ---MSC: " )
+	#pragma message (  SHOW_VALUE(_MSC_VER)     )
+	#pragma message (  SHOW_VALUE(_MSC_FULL_VER)  )
 
-	#pragma message ( "\nClang compiler: \n __clang__=" STRING(__clang__)  ", \n __GLIBCPP__=" STRING(__GLIBCPP__) " , \n __GLIBCXX__=" STRING(__GLIBCXX__) )
+	#pragma message ( "\n  ---GNU: " )
+	#pragma message (  SHOW_VALUE(__GNUC__)  )
+	#pragma message (  SHOW_VALUE(__GNUC_MINOR__)  )
+	#pragma message (  SHOW_VALUE(__GNUC_PATCHLEVEL__)  )
 
-    #pragma message ( "\n ---> STD: \n STD_CODECVT_NOT_SUPPORTED=" STRING(STD_CODECVT_NOT_SUPPORTED) " , \n STD_THREAD_NOT_SUPPORTED=" STRING(STD_THREAD_NOT_SUPPORTED) )
+	#pragma message ( "\n  ---Clang compiler: " )
+	#pragma message (  SHOW_VALUE(__clang__)  )
+	#pragma message (  SHOW_VALUE(__GLIBCPP__)  )
+	#pragma message (  SHOW_VALUE(__GLIBCXX__)  )
 
-    #pragma message ( "\n STD_NUMERIC_CONVERSIONS_NOT_SUPPORTED=" STRING(STD_NUMERIC_CONVERSIONS_NOT_SUPPORTED) " , \n STD_TO_STRING_NOT_SUPPORTED=" STRING(STD_TO_STRING_NOT_SUPPORTED) ", \n STD_TO_WSTRING_NOT_SUPPORTED=" STRING(STD_TO_WSTRING_NOT_SUPPORTED))
+    #pragma message ( "\n -----> STD:  " )
+	#pragma message (  SHOW_VALUE(STD_CODECVT_NOT_SUPPORTED)  )
+	#pragma message (  SHOW_VALUE(STD_THREAD_NOT_SUPPORTED)  )
+	#pragma message (  SHOW_VALUE(STD_NUMERIC_CONVERSIONS_NOT_SUPPORTED)  )
+	#pragma message (  SHOW_VALUE(STD_TO_STRING_NOT_SUPPORTED)  )
+	#pragma message (  SHOW_VALUE(STD_TO_WSTRING_NOT_SUPPORTED)  )
+	#pragma message (  SHOW_VALUE(USE_github_com_meganz_mingw_std_threads)  )
+	#pragma message (  SHOW_VALUE(NANA_ENABLE_MINGW_STD_THREADS_WITH_MEGANZ)  )
+	#pragma message (  SHOW_VALUE(STD_THREAD_NOT_SUPPORTED)  )
+	#pragma message (  SHOW_VALUE(STD_put_time_NOT_SUPPORTED)  )
+	#pragma message (  SHOW_VALUE(STD_MAKE_UNIQUE_NOT_SUPPORTED)  )
 
-	#pragma message ( "\n USE_github_com_meganz_mingw_std_threads=" STRING(USE_github_com_meganz_mingw_std_threads) ", \n NANA_ENABLE_MINGW_STD_THREADS_WITH_MEGANZ=" STRING(NANA_ENABLE_MINGW_STD_THREADS_WITH_MEGANZ)"  , \n STD_THREAD_NOT_SUPPORTED=" STRING(STD_THREAD_NOT_SUPPORTED) )
-
-    #pragma message ( "\n STD_put_time_NOT_SUPPORTED=" STRING(STD_put_time_NOT_SUPPORTED) " , \n STD_MAKE_UNIQUE_NOT_SUPPORTED=" STRING(STD_MAKE_UNIQUE_NOT_SUPPORTED)" , \n STD_FILESYSTEM_NOT_SUPPORTED=" STRING(STD_FILESYSTEM_NOT_SUPPORTED))
-
-	#pragma message ( "\n BOOST_FILESYSTEM_AVAILABLE=" STRING(BOOST_FILESYSTEM_AVAILABLE) ", \n BOOST_FILESYSTEM_FORCE =" STRING(BOOST_FILESYSTEM_FORCE) " , \n STD_FILESYSTEM_FORCE=" STRING(STD_FILESYSTEM_FORCE) ", \n NANA_FILESYSTEM_FORCE=" STRING(NANA_FILESYSTEM_FORCE)   )
-
-	#pragma message ( "\n CXX_NO_INLINE_NAMESPACE=" STRING(CXX_NO_INLINE_NAMESPACE) ", \n __has_include=" STRING(__has_include)"  , \n __cpp_lib_experimental_filesystem=" STRING(__cpp_lib_experimental_filesystem) )
-
-    #pragma message ( "\n NANA_USING_NANA_FILESYSTEM=" STRING(NANA_USING_NANA_FILESYSTEM) ", \n NANA_USING_STD_FILESYSTEM=" STRING(NANA_USING_STD_FILESYSTEM)"  , \n NANA_USING_BOOST_FILESYSTEM=" STRING(NANA_USING_BOOST_FILESYSTEM) )
+	#pragma message (  SHOW_VALUE(STD_FILESYSTEM_NOT_SUPPORTED)  )
+	#pragma message (  SHOW_VALUE(BOOST_FILESYSTEM_AVAILABLE)  )
+	#pragma message (  SHOW_VALUE(BOOST_FILESYSTEM_FORCE)  )
+	#pragma message (  SHOW_VALUE(STD_FILESYSTEM_FORCE)  )
+	#pragma message (  SHOW_VALUE(NANA_FILESYSTEM_FORCE)  )
+	#pragma message (  SHOW_VALUE(CXX_NO_INLINE_NAMESPACE)  )
+	//#pragma message (  SHOW_VALUE(__has_include)  )
+	#pragma message (  SHOW_VALUE(__cpp_lib_experimental_filesystem)  )
+	#pragma message (  SHOW_VALUE(NANA_USING_NANA_FILESYSTEM)  )
+	#pragma message (  SHOW_VALUE(NANA_USING_STD_FILESYSTEM)  )
+	#pragma message (  SHOW_VALUE(NANA_USING_BOOST_FILESYSTEM)  )
 
+    #pragma message ( "\n#include <nana/filesystem/filesystem_selector.hpp> " )
     #include <nana/filesystem/filesystem_selector.hpp>
 
-    #pragma message ( "\n ...including filesystem_selector: \n STD_put_time_NOT_SUPPORTED=" STRING(STD_put_time_NOT_SUPPORTED) " , \n STD_FILESYSTEM_NOT_SUPPORTED=" STRING(STD_FILESYSTEM_NOT_SUPPORTED))
+	#pragma message (  SHOW_VALUE(STD_MAKE_UNIQUE_NOT_SUPPORTED)  )
+	#pragma message (  SHOW_VALUE(STD_FILESYSTEM_NOT_SUPPORTED)  )
+	#pragma message (  SHOW_VALUE(BOOST_FILESYSTEM_AVAILABLE)  )
+	#pragma message (  SHOW_VALUE(BOOST_FILESYSTEM_FORCE)  )
+	#pragma message (  SHOW_VALUE(STD_FILESYSTEM_FORCE)  )
+	#pragma message (  SHOW_VALUE(NANA_FILESYSTEM_FORCE)  )
+	#pragma message (  SHOW_VALUE(CXX_NO_INLINE_NAMESPACE)  )
+	//#pragma message (  SHOW_VALUE(__has_include)  )
+	#pragma message (  SHOW_VALUE(__cpp_lib_experimental_filesystem)  )
+	#pragma message (  SHOW_VALUE(NANA_USING_NANA_FILESYSTEM)  )
+	#pragma message (  SHOW_VALUE(NANA_USING_STD_FILESYSTEM)  )
+	#pragma message (  SHOW_VALUE(NANA_USING_BOOST_FILESYSTEM)  )
 
-	#pragma message ( "\n BOOST_FILESYSTEM_AVAILABLE=" STRING(BOOST_FILESYSTEM_AVAILABLE) ", \n BOOST_FILESYSTEM_FORCE =" STRING(BOOST_FILESYSTEM_FORCE) " , \n STD_FILESYSTEM_FORCE=" STRING(STD_FILESYSTEM_FORCE) ", \n NANA_FILESYSTEM_FORCE=" STRING(NANA_FILESYSTEM_FORCE)   )
+	#pragma message (  SHOW_VALUE(NANA_UNICODE)  )
+	#pragma message (  SHOW_VALUE(_UNICODE)  )
+	#pragma message (  SHOW_VALUE(UNICODE)  )
 
-	#pragma message ( "\n CXX_NO_INLINE_NAMESPACE=" STRING(CXX_NO_INLINE_NAMESPACE) ", \n __has_include=" STRING(__has_include)"  , \n __cpp_lib_experimental_filesystem=" STRING(__cpp_lib_experimental_filesystem) )
-
-    #pragma message ( "\n NANA_USING_NANA_FILESYSTEM=" STRING(NANA_USING_NANA_FILESYSTEM) ", \n NANA_USING_STD_FILESYSTEM=" STRING(NANA_USING_STD_FILESYSTEM)"  , \n NANA_USING_BOOST_FILESYSTEM=" STRING(NANA_USING_BOOST_FILESYSTEM) )
+    #pragma message ( "\n -----> Libraries: " )
+	#pragma message (  SHOW_VALUE(NANA_ENABLE_AUDIO)  )
+	#pragma message (  SHOW_VALUE(NANA_ENABLE_PNG)  )
+	#pragma message (  SHOW_VALUE(USE_LIBPNG_FROM_OS)  )
+	#pragma message (  SHOW_VALUE(NANA_LIBPNG)  )
+	#pragma message (  SHOW_VALUE(NANA_ENABLE_JPEG)  )
+	#pragma message (  SHOW_VALUE(USE_LIBJPEG_FROM_OS)  )
+	#pragma message (  SHOW_VALUE(NANA_LIBJPEG)  )
    
    // #pragma message ( "\n =" STRING() ", \n =" STRING()"  , \n =" STRING() )
-   
-    #pragma message ( "\n Show value: =>\n " SHOW_VALUE(NANA_USING_NANA_FILESYSTEM)   )
-
-
-	#pragma message ( "\nUNICODE: \n NANA_UNICODE=" STRING(NANA_UNICODE) ", \n _UNICODE =" STRING(_UNICODE) " , \n UNICODE=" STRING(UNICODE)  )
-
-	#pragma message ( "\n ---> Libraries: \n NANA_ENABLE_AUDIO=" STRING(NANA_ENABLE_AUDIO) ", \n NANA_ENABLE_PNG =" STRING(NANA_ENABLE_PNG) " , \n USE_LIBPNG_FROM_OS=" STRING(USE_LIBPNG_FROM_OS) " , \n NANA_LIBPNG=" STRING(NANA_LIBPNG) )
-
-	#pragma message ( "\n NANA_ENABLE_JPEG=" STRING(NANA_ENABLE_JPEG) ", \n USE_LIBJPEG_FROM_OS =" STRING(USE_LIBJPEG_FROM_OS) " , \n NANA_LIBJPEG=" STRING(NANA_LIBJPEG) )
-
 
     #if defined(STOP_VERBOSE_PREPROCESSOR)
         #error ("\nCompilation stopped to avoid annoying messages")