eliminate -Wextra and -pedantic warnings

source/gui/detail/bedrock_posix.cpp

@@ -153,7 +153,7 @@ namespace detail
 		delete impl_;
 	}
 
-	void bedrock::map_thread_root_buffer(core_window_t*, bool forced, const rectangle*)
+	void bedrock::map_thread_root_buffer(core_window_t*, bool /*forced*/, const rectangle*)
 	{
 		//GUI in X11 is thread-independent, so no implementation.
 	}
@@ -366,7 +366,7 @@ namespace detail
 		return impl_->estore;
 	}
 
-	void bedrock::map_through_widgets(core_window_t* wd, native_drawable_type drawable)
+	void bedrock::map_through_widgets(core_window_t*, native_drawable_type)
 	{
 		//No implementation for Linux
 	}
@@ -523,7 +523,7 @@ namespace detail
 		}
 	}
 
-	void window_proc_for_packet(Display * display, nana::detail::msg_packet_tag& msg)
+	void window_proc_for_packet(Display * /*display*/, nana::detail::msg_packet_tag& msg)
 	{
 		static auto& brock = detail::bedrock::instance();
 
@@ -642,7 +642,7 @@ namespace detail
 		return wchar_t(keysym);
 	}
 
-	void window_proc_for_xevent(Display* display, XEvent& xevent)
+	void window_proc_for_xevent(Display* /*display*/, XEvent& xevent)
 	{
 		typedef detail::bedrock::core_window_t core_window_t;
 
@@ -1308,7 +1308,7 @@ namespace detail
 		}
 	}
 
-	void bedrock::pump_event(window modal_window, bool is_modal)
+	void bedrock::pump_event(window modal_window, bool /*is_modal*/)
 	{
 		thread_context * context = open_thread_context();
 		if(0 == context->window_count)

source/gui/detail/native_window_interface.cpp

@@ -173,6 +173,8 @@ namespace nana{
 									mi.rcWork.right - mi.rcWork.left, mi.rcWork.bottom - mi.rcWork.top);
 				}
 			}
+#else
+			static_cast<void>(pos); //eliminate unused parameter compiler warning.
 #endif
 			return rectangle{ primary_monitor_size() };
 		}
@@ -547,6 +549,8 @@ namespace nana{
 			activate_window(reinterpret_cast<native_window_type>(
 								::GetWindow(reinterpret_cast<HWND>(wd), GW_OWNER)
 							));
+#else
+			static_cast<void>(wd);	//eliminate unused parameter compiler warning.
 #endif
 		}
 
@@ -565,6 +569,8 @@ namespace nana{
 				else
 					::PostMessage(native_wd, nana::detail::messages::async_activate, 0, 0);
 			}
+#else
+			static_cast<void>(wd);	//eliminate unused parameter compiler warning.
 #endif
 		}
 
@@ -640,6 +646,7 @@ namespace nana{
 
 				::XFlush(disp);
 			}
+			static_cast<void>(active);	//eliminate unused parameter compiler warning.
 #endif
 		}
 
@@ -715,6 +722,7 @@ namespace nana{
 #if defined(NANA_WINDOWS)
 			::InvalidateRect(reinterpret_cast<HWND>(wd), nullptr, true);
 #elif defined(NANA_X11)
+			static_cast<void>(wd); //eliminate unused parameter compiler warning.
 #endif
 		}
 
@@ -963,6 +971,7 @@ namespace nana{
 			::SetWindowPos(native_wd, HWND_NOTOPMOST, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE);
 			::AttachThreadInput(::GetCurrentThreadId(), fg_tid, FALSE);
 #else
+			static_cast<void>(activated); //eliminate unused parameter compiler warning.
 			set_window_z_order(wd, nullptr, z_order_action::top);
 #endif
 		}
@@ -1414,6 +1423,11 @@ namespace nana{
 				if(static_cast<unsigned>(y) > sz.height + ext_height)
 					sz.height = static_cast<unsigned>(y);
 			}
+#else
+			//eliminate unused parameter compiler warning.
+			static_cast<void>(ext_width);
+			static_cast<void>(ext_height);
+			static_cast<void>(true_for_max);
 #endif
 			return sz;
 		}

source/gui/detail/window_layout.cpp

@@ -357,7 +357,7 @@ namespace nana
 
 			//_m_notify_glasses
 			//@brief:	Notify the glass windows that are overlapped with the specified vis_rect
-			void window_layout::_m_notify_glasses(core_window_t* const sigwd, const nana::rectangle& r_visual)
+			void window_layout::_m_notify_glasses(core_window_t* const sigwd, const nana::rectangle& /*r_visual*/)
 			{
 				typedef category::flags cat_flags;