Fix clang warnings: mark Screen overrides and replace deprecated -Ofast with -O3 -ffast-math

Author: jvde-github

CMakeLists.txt

@@ -104,7 +104,7 @@ if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR CMAKE_CXX_COMPILER_ID MATCHES "Clang"
         add_compile_options(-fsanitize=thread -fno-omit-frame-pointer)
         add_link_options(-fsanitize=thread)
     else()
-        set(OPTIMIZATION_FLAGS "-Ofast")
+        set(OPTIMIZATION_FLAGS "-O3 -ffast-math")
     endif()
     add_compile_options("-Wall")
     add_compile_options("-Wno-psabi")

Makefile

@@ -3,7 +3,7 @@ OBJ = Config.o DeviceManager.o Main.o MapTiles.o Prometheus.o Receiver.o WebDB.o
 INCLUDE = -I. -ISource -ISource/JSON/ -ISource/DBMS/ -ISource/Tracking/ -ISource/Library/ -ISource/Marine/ -ISource/Aviation/ -ISource/DSP/ -ISource/Application/ -ISource/IO/ -ISource/Utilities/ 
 CC = clang
 
-override CFLAGS +=  -Ofast -std=c++11 -g -pg -Wno-sign-compare $(INCLUDE)
+override CFLAGS +=  -O3 -ffast-math -std=c++11 -g -pg -Wno-sign-compare $(INCLUDE)
 override LFLAGS += -lstdc++ -lpthread -g -pg -lm  -o AIS-catcher
 
 CFLAGS_RTL = -DHASRTLSDR $(shell pkg-config --cflags librtlsdr)

Source/IO/Screen.h

@@ -51,11 +51,11 @@ namespace IO
 		using StreamIn<AIS::GPS>::Receive;
 
 		void Connect(Receiver &r);
-		void Receive(const AIS::Message *data, int len, TAG &tag);
-		void Receive(const JSON::JSON *data, int len, TAG &tag);
-		void Receive(const AIS::GPS *data, int len, TAG &tag);
+		void Receive(const AIS::Message *data, int len, TAG &tag) override;
+		void Receive(const JSON::JSON *data, int len, TAG &tag) override;
+		void Receive(const AIS::GPS *data, int len, TAG &tag) override;
 
-		Setting &SetKey(AIS::Keys key, const std::string &arg)
+		Setting &SetKey(AIS::Keys key, const std::string &arg) override
 		{
 			switch (key)
 			{