all: myapp# Which compilerCC = gcc# Where are include files keptINCLUDE = .# Options for developmentCFLAGS = -g -Wall -ansi# Options for release# CFLAGS = -O -Wall -ansimyapp: main.o 2.o 3.o	$(CC) -o myapp main.o 2.o 3.omain.o: main.c a.h	$(CC) -I$(INCLUDE) $(CFLAGS) -c main.c2.o: 2.c a.h b.h	$(CC) -I$(INCLUDE) $(CFLAGS) -c 2.c3.o: 3.c b.h c.h	$(CC) -I$(INCLUDE) $(CFLAGS) -c 3.c