.PHONY: clean,real-clean
  LD = gcc
  CC = gcc
  CFLAGS = 
  SRC=$(wildcard *.c)
  OBJ=$(SRC:.c=.o)
  prog : $(OBJ)
  	$(LD) -o $@ $^
  
  %.o : %.c
  	$(CC) $(CFLAGS) -c $^	
  
  clean : 
  	rm -f *.o	
  
  real-clean : clean
  	rm -f prog