build makefile for my coding!!

I learn how to build makefile from below:
http://www.chinaunix.net/old_jh/23/408225.html
http://blog.chinaunix.net/uid-23089249-id-2855999.html


This is my first makefile demo!!It's so simple and crube, but i will make if better gradually!!

It's direction:
warrior@warrior:~/CreazyCode/Cproject/test$ ls
demo.c  demo.h  main.c  main.h  makefile

And it's content:
#makefile demo V1.0
#author: warrior
#mail:[e-mail]
#date:2015/3/21

CC          := gcc
CFLAGS      := -c -g  -W -Wall
DIR         := ./

SOURCES     := $(shell ls *.c) 
OBJS        := $(patsubst %.c,%.o,$(SOURCES)) 
TARGET      := target

${TARGET} : ${OBJS} 
${CC} ${CFLAGS} -o $@ $^   

%.o : %.c
$(CC)  ${CFLAGS} -o $@ $<


.PHONY : clean
clean :
-rm -f *.o target