Add a helper to calculate the size of every function in the firmware

Makefile

@@ -37,6 +37,7 @@ ARDUINO_BUILDER_PATH=$(ARDUINO_PATH)/arduino-builder
 AVRDUDE_PATH=$(ARDUINO_TOOLS_PATH)/avr/bin/avrdude
 AVRDUDE_CONF_PATH=$(ARDUINO_TOOLS_PATH)/avr/etc/avrdude.conf
 AVR_SIZE_PATH=$(ARDUINO_TOOLS_PATH)/avr/bin/avr-size
+AVR_NM_PATH=$(ARDUINO_TOOLS_PATH)/avr/bin/avr-nm
 
 
 
@@ -111,6 +112,9 @@ compile: dirs
 size: compile
 	$(AVR_SIZE_PATH) -C --mcu=$(MCU) $(ELF_FILE_PATH)
 
+size-map: compile
+	$(AVR_NM_PATH) --size-sort -C -r $(ELF_FILE_PATH)
+
 
 hex-with-bootloader: compile
 	@cat $(HEX_FILE_PATH) | awk '/^:00000001FF/ == 0' > $(HEX_FILE_WITH_BOOTLOADER_PATH)