my makefile for CPP v2.0

this is my second makefile for my Cpp project!
It's designed for multi folders!

It's direction:
warrior@warrior-ThinkPad:~/CreazyCode/CPPproject/Mdemo$ tree
.
├── inc
│   ├── demo.h
│   └── main.h
├── log
│   └── info.log
├── makefile
├── obj
├── src
│   ├── demo.cc
│   ├── main.cc
│   └── out.cc
└── tags

The makefile content:

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1. #makefile demo V2.0
   
2. #author: warrior
   
3. #mail:[e-mail]
   
4. #date:2015/5/8
   
5. 
   
6. CXX := g++
   
7. CFLAGS := -c -g -W -Wall
   
8. SRCDIR := ./src
   
9. INCDIR := -I./inc -I.
   
10. OBJDIR := ./obj
    
11. 
    
12. SOURCES := $(shell ls $(SRCDIR)/*.cc)
    
13. OBJS := $(patsubst %.cc,%.o,$(SOURCES))
    
14. TARGET := target
    
15. 
    
16. 
    
17. ${TARGET} : ${OBJS}
    
18.     ${CXX} -o $@ $^
    
19. 
    
20. %.o : %.cc
    
21.     $(CXX) ${CFLAGS} -o $@ $< $(INCDIR)
    
22. 
    
23. 
    
24. 
    
25. 
    
26. .PHONY : clean
    
27. clean :
    
28.     -rm -f $(SRCDIR)/*.o target