# as poume oti exoume ena programma me 3 C arxeia, foo.c bar.c kai xyzzy.c

# as ftiaksoume mia metavliti me ta object files pou tha xreiastei na ginoun build
obj = foo.o bar.o xyzzy.o

# as poume oti to binary tha legetai test
bin = test

# as poume oti theloume na perasoume ta eksis flags ston C compiler
CFLAGS = -pedantic -Wall -g

# as poume oti theloume na perasoume ta eksis flags ston linker
LDFLAGS = -lm

# default rule, pos na ftiaxtei ena binary apo mia seira object files, me ti
# voitheia tou linker. kaloume to c compiler frontend (cc) o opoios kalei ton linker monos tou
$(bin): $(obj)
	$(CC) -o $@ $(obj) $(LDFLAGS)

# de xreiazetai na orisoume pos ginontai compile object files apo C source files
# alla an to kaname gia kapoio apo ta parapano tha itan etsi (min to symperilabeis ayto)
foo.o: foo.c
	$(CC) $(CFLAGS) -c foo.c

# useless compile-only target
compile: $(obj)

# na kai ena clean rule pou katharizei ola ta object files kai to binary
clean:
	rm -f $(obj) $(bin)