# WARNING:  This is not the same as HW08.  I am illustrating concepts, not doing HW08.
#           There may be some similarities.  Some names will be changed deliberately.

NAME=print_twos
TEST_NAME=test_$(NAME)
C_FILENAME=$(NAME).c
TEST_C_FILENAME=$(TEST_NAME).c

# Rule 'test_print_twos' builds the (executable) file test_print_twos.
$(TEST_NAME):  $(TEST_NAME).o  $(NAME).o
    # test_print_twos
    gcc  $(TEST_NAME).o  $(NAME).o  -o $(TEST_NAME)


# Rule 'test_print_twos.o' builds the (object file) file test_print_twos.o.
$(TEST_NAME).o:  $(TEST_C_FILENAME)
    # test_print_twos.o.
    gcc  -c  $(TEST_C_FILENAME)

# Rule 'print_twos.o' builds the (object file) file print_twos.o.
$(NAME).o:  $(C_FILENAME)
    # print_twos.o.
    gcc  -c  $(C_FILENAME)

run:  $(TEST_NAME)
    ./$(TEST_NAME)

clean:
    rm  -f  $(TEST_NAME)  *.o

.PHONY:  run
# Every rule that does not create a file by the name of that rule's target (e.g., "run")
# is a "phony rule" and must be listed after .PHONY: ▒    Yes, this is bizarre.
#
# If you just type 
#  $  make
# in bash, you will run the first rule in the Makefile.   Customarily, that should 
# build the executable.