- cd about && make clean
- cd help && make clean
- cd helpview && make clean
- cd printing && make clean
- cd test && make clean
- cd virtual && make clean
- cd widget && make clean
- cd zip && make clean
+ cd about && $(MAKE) clean
+ cd help && $(MAKE) clean
+ cd helpview && $(MAKE) clean
+ cd printing && $(MAKE) clean
+ cd test && $(MAKE) clean
+ cd virtual && $(MAKE) clean
+ cd widget && $(MAKE) clean
+ cd zip && $(MAKE) clean