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LDFLAGS       = -mmcu=$(MCU) -Wl,--gc-sections -Os

# library sources
$(OBJDIR)/%.o: $(ARDUINO_LIB_PATH)/%.c
	$(ECHO) 'Building $(notdir $<)'
	$(MKDIR) $(dir $@)
	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@

$(OBJDIR)/%.o: $(ARDUINO_LIB_PATH)/%.cpp
	$(ECHO) 'Building $(notdir $<)'
	$(MKDIR) $(dir $@)
	$(CC) -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@

$(OBJDIR)/%.o: $(USER_LIB_PATH)/%.cpp
	$(ECHO) 'Building $(notdir $<)'
	$(MKDIR) $(dir $@)
	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@

$(OBJDIR)/%.o: $(USER_LIB_PATH)/%.c
	$(ECHO) 'Building $(notdir $<)'
	$(MKDIR) $(dir $@)
	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@

# normal local sources
# .o rules are for objects, .d for dependency tracking
# there seems to be an awful lot of duplication here!!!
$(OBJDIR)/%.o: %.c
	$(ECHO) 'Building $(notdir $<)'
	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@

$(OBJDIR)/%.o: %.cpp
	$(ECHO) 'Building $(notdir $<)'
	$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@

# the ino -> cpp -> o file
$(OBJDIR)/%.cpp: %.ino
	$(ECHO) 'Building $(notdir $<)'
	$(MKDIR) $(dir $@)
	$(ECHO) '#include <Arduino.h>' > $@
	$(CAT)  $< >> $@

$(OBJDIR)/%.o: $(OBJDIR)/%.cpp
	$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@

# core files
$(OBJDIR)/%.o: $(ARDUINO_CORE_PATH)/%.c
	$(ECHO) 'Building $(notdir $<)'
	$(CC) -c $(CPPFLAGS) $(CFLAGS) $< -o $@

$(OBJDIR)/%.o: $(ARDUINO_CORE_PATH)/%.cpp
	$(ECHO) 'Building $(notdir $<)'
	$(CXX) -c $(CPPFLAGS) $(CXXFLAGS) $< -o $@

# various object conversions
$(OBJDIR)/%.hex: $(OBJDIR)/%.elf
	$(ECHO) 'Generating $(notdir $@)'
	$(OBJCOPY) -O ihex -R .eeprom $< $@
	$(ECHO)

all: 		$(OBJDIR) $(TARGET_HEX)
	$(ECHO) 'Built! Now you can run "duino upload"'

$(OBJDIR):
		$(MKDIR) $(OBJDIR)

$(TARGET_ELF): 	$(LOCAL_OBJS) $(CORE_LIB) $(OTHER_OBJS)
		$(CC) $(LDFLAGS) -o $@ $(LOCAL_OBJS) $(CORE_LIB) $(OTHER_OBJS) -lc -lm

$(CORE_LIB):	$(CORE_OBJS) $(LIB_OBJS) $(USER_LIB_OBJS)
		$(ECHO) 'Linking $(notdir $(CORE_LIB))'
		$(AR) rcs $@ $(CORE_OBJS) $(LIB_OBJS) $(USER_LIB_OBJS)

.PHONY: all