###############################################################################
# Makefile for the serial_lcd CPP version for GCC

## General Flags
PROJECT = serial_lcd_cpp
MCU = attiny2313
TARGET = $(PROJECT).elf
CC = avr-g++

## Options common to compile, link and assembly rules
COMMON = -mmcu=$(MCU)

## Compile options common for all C compilation units.
CFLAGS = $(COMMON)
CFLAGS += -gdwarf-2  -DF_CPU=14745600UL -Os 
CFLAGS +=-funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
CFLAGS += -Wall -Wundef -Wa,-adhlns=./$(*F).lst
CFLAGS += -MMD -MP -MT $(*F).o -MF .dep/$(@F).d 

## Assembly specific flags
ASMFLAGS = $(COMMON)
ASMFLAGS += $(CFLAGS)
ASMFLAGS += -x assembler-with-cpp -Wa,-gdwarf2

## Linker flags
LDFLAGS = $(COMMON)
LDFLAGS +=  -Wl,-Map=$(PROJECT).map,--cref -Wl,-gc-sections -Wl,-relax


## Intel Hex file production flags
HEX_FLASH_FLAGS = -R .eeprom
HEX_EEPROM_FLAGS = -j .eeprom
HEX_EEPROM_FLAGS += --set-section-flags=.eeprom="alloc,load"
HEX_EEPROM_FLAGS += --change-section-lma .eeprom=0 --no-change-warnings


## Include Directories
INCLUDES = -I.

## Objects that must be built in order to link
OBJECTS = $(PROJECT).o 

## Objects explicitly added by the user
LINKONLYOBJECTS = 

## Build
all: $(PROJECT).hex $(PROJECT).eep $(PROJECT).lss size 

## Compile
$(PROJECT).o: ../$(PROJECT).cpp
	$(CC) $(INCLUDES) $(CFLAGS) -c  $< -o $(PROJECT).o

##Link
$(TARGET): $(OBJECTS)
	 $(CC) $(LDFLAGS) $(OBJECTS) $(LINKONLYOBJECTS) $(LIBDIRS) $(LIBS) -o $(TARGET)

$(PROJECT).hex: $(TARGET)
	avr-objcopy -O ihex $(HEX_FLASH_FLAGS)  $< $@

$(PROJECT).eep: $(TARGET)
	-avr-objcopy $(HEX_EEPROM_FLAGS) -O ihex $< $@ || exit 0

$(PROJECT).lss: $(TARGET)
	avr-objdump -h -S $< > $@

.PHONY: size

size: ${TARGET}
	@echo $(TARGET) size
	@avr-size -C --mcu=${MCU} ${TARGET}

## Clean target
.PHONY: distclean
distclean: clean
	@rm -rf $(PROJECT).hex $(PROJECT).lss $(PROJECT).map $(PROJECT).lst

.PHONY: clean
clean:
	@rm -rf $(OBJECTS) $(TARGET) $(PROJECT).eep .dep

## Other dependencies
-include $(shell mkdir .dep 2>/dev/null) $(wildcard .dep/*)