1# https://www.gnu.org/software/make/manual/html_node/Target_002dspecific.html
 2
 3CFLAGS = -O
 4
 5test: prog
 6
 7prog: CFLAGS = -g
 8prog : prog.o
 9	echo prog $(CFLAGS)
10
11prog.o : prog.c
12	echo cc $(CFLAGS) -o prog.o -c prog.c
13
14prog.c:
15	touch prog.c
16
17