Makefile

##############################################################################
BUILD = build
BIN = bl

##############################################################################
.PHONY: all directory clean size

CC = arm-none-eabi-gcc
OBJCOPY = arm-none-eabi-objcopy
SIZE = arm-none-eabi-size

CFLAGS += -W -Wall --std=gnu11 -Os -ggdb
CFLAGS += -fno-diagnostics-show-caret
CFLAGS += -fdata-sections -ffunction-sections
CFLAGS += -funsigned-char -funsigned-bitfields
CFLAGS += -mcpu=cortex-m0plus -mthumb
CFLAGS += -MD -MP -MT $(BUILD)/$(*F).o -MF $(BUILD)/$(@F).d

LDFLAGS += -mcpu=cortex-m0plus -mthumb
LDFLAGS += -Wl,--gc-sections
LDFLAGS += -Wl,--script=linker/samd10d14.ld

INCLUDES = -Iinclude -I.
SRCS = $(wildcard *.c)

DEFINES += \
  -D__SAMD10D14AS__ \
  -DDONT_USE_CMSIS_INIT \
  -DF_CPU=8000000

CFLAGS += $(INCLUDES) $(DEFINES)

OBJS = $(addprefix $(BUILD)/, $(patsubst %.c,%.o,$(SRCS)))

all: directory $(BUILD)/$(BIN).elf $(BUILD)/$(BIN).hex $(BUILD)/$(BIN).bin size

$(BUILD)/$(BIN).elf: $(OBJS)
	@echo LD $@
	@$(CC) $(LDFLAGS) $^ $(LIBS) -o $@

$(BUILD)/$(BIN).hex: $(BUILD)/$(BIN).elf
	@echo OBJCOPY $@
	@$(OBJCOPY) -O ihex $^ $@

$(BUILD)/$(BIN).bin: $(BUILD)/$(BIN).elf
	@echo OBJCOPY $@
	@$(OBJCOPY) -O binary $^ $@

$(BUILD)/%.o: %.c
	@echo CC $@ from $(filter %.c,$^)
	@$(CC) $(CFLAGS) $(filter %.c,$^) -c -o $@

directory:
	@echo MKDIR $(BUILD)
	@mkdir -p $(BUILD)

size: $(BUILD)/$(BIN).elf
	@echo size:
	@$(SIZE) -t $^

clean:
	@echo clean
	@rm -rf $(BUILD)

-include $(wildcard $(BUILD)/*.d)