Makefile

CROSS_COMPILE ?= arm-none-eabi-
VERSION ?= "dev"

CC = $(CROSS_COMPILE)gcc
AS = $(CROSS_COMPILE)as
LD = $(CROSS_COMPILE)gcc
OBJCOPY = $(CROSS_COMPILE)objcopy

CFLAGS  = -mcpu=cortex-m0plus -mfloat-abi=soft -mlittle-endian -mthumb
CFLAGS += -mthumb-interwork -ffreestanding -ffunction-sections -fdata-sections
CFLAGS += -g3 -Os -gstrict-dwarf -Wall -Werror

#CFLAGS+=-DDEBUG_UART

CFLAGS+=-DVERSION=\"$(VERSION)\"

LDFLAGS = -T linker.ld -mcpu=cortex-m0plus -mlittle-endian -g -nostdlib -mthumb -static
LIBS += -lgcc

OBJECTS  = startup.o main.o miniprintf.o uart.o systick.o adc.o vref.o misc.o
OBJECTS += iomux.o sysctl.o gpio.o cp.o i2c.o nvic.o nvm.o config.o

DEPS := $(shell find -name '*.d')

all: mcu.elf mcu.bin

%.o: %.c
	$(COMPILE.c) -MT "$@ $(@:.o=.d)" -MMD -o $@ $<

mcu.elf: $(OBJECTS)
	$(LD) $(LDFLAGS) $(OBJECTS) $(LIBS) -o $@

mcu.bin: mcu.elf
	$(OBJCOPY) -O binary $< $@

.PHONY: clean
clean:
	$(Q)rm -f mcu.elf mcu.bin $(DEPS) $(OBJECTS)

-include $(DEPS)