多个文件编译

#
DIR_INC = ./include
DIR_SRC = ./src
DIR_OBJ = ./obj
DIR_BIN = ./bin
DIR_LIB = ./lib

SRC = $(wildcard ${DIR_SRC}/*.c)
OBJ = $(patsubst %.c,${DIR_OBJ}/%.o,$(notdir ${SRC}))

TARGET = unit_test

BIN_TARGET = ${DIR_BIN}/${TARGET}

CC = arm-linux-gcc
CFLAGS = -g -Wall -I${DIR_INC}
LDFLAGS = -L${DIR_LIB}

${BIN_TARGET}:${OBJ}
    $(CC) $(LDFLAGS) $(OBJ) -o $@

${DIR_OBJ}/%.o:${DIR_SRC}/%.c
    $(CC) $(CFLAGS) -c  $< -o $@

.PHONY:clean
clean:
    find ${DIR_OBJ} -name *.o -exec rm -rf {} \