# add the warning flag to CFLAGS-variable
CFLAGS += -Wall

targets = hello

.PHONY: all
all: $(targets)

hello: hello.o hello_func.o
	$(CC) $^ -o $@

hello.o: hello.c hello_api.h
	$(CC) $(CFLAGS) -c $< -o $@

hello_func.o: hello_func.c hello_api.h
	$(CC) $(CFLAGS) -c $< -o $@

.PHONY: clean
clean:
	$(RM) $(targets) *.o