*Makefile MMCU was not set for linking (text overflow occurred)

Makefile

@@ -1,33 +1,40 @@
+include Makefile.cfg
+
 PROJECT=POCKET
 
-CC=avr-gcc
-CXX=avr-g++
-LINKER=$(CXX)
-
-MCU=atmega328p 
-CPU_SPEED=-DF_CPU=16000000UL
-ARDUINO_VERSION=ARDUINO_150
-
 INCLUDE_FOLDERS=  gamebuino arduino
 LIBS=-L../lib   -lgamebuino -larduino
 INCLUDE= $(foreach dir,$(INCLUDE_FOLDERS),-I$/../include/$(dir))
-CC_FLAGS=-mmcu=$(MCU) $(CPU_SPEED) -Wall -Werror -Os -c -ffunction-sections -fdata-sections -g
-DEFINE = -D$(ARDUINO_VERSION)
+EXE_DIR=Exe
+
+CC_FLAGS += -Werror -Wfatal-errors
 
 OBJ_DIR = Obj
 SRC_DIR = .
 
-default: build $(PROJECT).HEX size
+OBJECTS=$(addprefix $(OBJ_DIR)/,main.o Gameplay.o System.o Gfx.o Pad.o \
+								Player.o Camera.o Unit.o Menu.o Building.o)
 
-size:
-	avr-size Exe/$(PROJECT).ELF
+build: libs $(EXE_DIR)/$(PROJECT).HEX
+	avr-size $(EXE_DIR)/$(PROJECT).ELF
+	
+rebuild:
+	make clean
+	make build
+
+libs:
+	make -C Libs/libarduino/
+	make -C Libs/libgamebuino
+	make -C Libs/petit_fatfs
+	make -C Libs/tinyFAT
 
 clean:
 	rm *.elf -f
-	rm $(OBJ_DIR)/*.o -f -r
-
-build: 	$(addprefix $(OBJ_DIR)/,main.o Gameplay.o System.o Gfx.o Pad.o \
-								Player.o Camera.o Unit.o Menu.o Building.o)
+	rm $(OBJ_DIR)/*.o -f
+	make -C $$PWD/Libs/libarduino clean
+	make -C $$PWD/Libs/libgamebuino clean 
+	make -C $$PWD/Libs/petit_fatfs clean
+	make -C $$PWD/Libs/tinyFAT clean
 	
 $(OBJ_DIR)/%.o: $(SRC_DIR)/%.cpp
 	$(CXX) $< -o $@ $(INCLUDE) $(DEFINE) $(CC_FLAGS)
@@ -35,9 +42,11 @@ $(OBJ_DIR)/%.o: $(SRC_DIR)/%.cpp
 $(OBJ_DIR)/%.o: $(SRC_DIR)/%.c
 	$(CC) $< -o $@ $(INCLUDE) $(DEFINE) $(CC_FLAGS)
 	
-$(PROJECT).ELF:
-	$(LINKER) $(OBJ_DIR)/*.o -o Exe/$(PROJECT).elf -mmcu=$(MCU) -g $(LIBS) $(INCLUDE) -flto -Xlinker -Map=Exe/POCKET.MAP -Wl,--gc-sections
+$(EXE_DIR)/$(PROJECT).ELF: $(OBJECTS)
+	mkdir -p $(EXE_DIR)
+	$(LINKER) $^ -o $@ -g $(DEFINE) $(LIBS) $(INCLUDE) -flto -Xlinker -Map=$(EXE_DIR)/POCKET.MAP -Wl,-emain -Wl,--gc-sections 
+ 
+$(EXE_DIR)/$(PROJECT).HEX: $(EXE_DIR)/$(PROJECT).ELF
+	avr-objcopy -j.text -j.data -j.bss -O ihex $^ $@
 
-$(PROJECT).HEX: $(PROJECT).ELF
-	avr-objcopy -j.text -j.data -j.bss -O ihex Exe/$^ $@
-	mv $@ Exe/
+.PHONY: all libs clean

Makefile.cfg

@@ -11,4 +11,4 @@ PATH := $(PATH):$(AVR_TOOLCHAIN_PATH)/bin/
 
 DEFINE = -DARDUINO=$(ARDUINO_VERSION) -mmcu=$(MCU) -DF_CPU=$(CPU_SPEED)
 
-CC_FLAGS=-Wall -Os -c -ffunction-sections -fdata-sections
+CC_FLAGS=-Wall -Os -c  -ffunction-sections -fdata-sections

Unit.c

@@ -252,7 +252,7 @@ void UnitAcceptAction(TYPE_UNIT* ptrUnit)
 		break;
 		
 		default:
-			return NULL;
+			return;
 		break;
 	}
 	

main.cpp

@@ -19,8 +19,8 @@ int main(){
 	
 	gb.begin();
 	
-	/* MAIN LOOP */
-	while(1)
+	// Main loop
+    while(1)
 	{
 		gb.titleScreen(F("Pocket Empires"));