- (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)