basic makefile for an stm32 target

Makefile

PROJ=token
OUT=out
FILES=init startup_stm32f10x_cl touch usb

OBJS=$(addprefix $(OUT)/,$(addsuffix .o,$(FILES)))

default: $(OUT)/$(PROJ).elf

$(shell mkdir -p $(OUT))

-include $(OBJS:.o=.d)

CFLAGS=-ggdb3 -O2 -mcpu=cortex-m3 -mthumb -mno-thumb-interwork -nostdlib -Iinc --std=gnu11
CFLAGS+=-ffunction-sections -fdata-sections -Wl,--gc-sections

CC=arm-none-eabi-gcc

$(OUT)/%.elf: $(OUT)/main_%.o $(OBJS) linker.ld
	$(CC) $(OBJS) $(COMMON_OBJS) $< $(CFLAGS) $(LDFLAGS) -T linker.ld -o $@

$(OUT)/%.o: %.s
	$(CC) -c $(CFLAGS) $< -o $@

$(OUT)/%.o: %.c
	$(CC) -MMD -c $(CFLAGS) $< -o $@

clean:
	rm -f $(OUT)/*

.DELETE_ON_ERROR:

.PHONY: clean default

.SECONDARY: