makefile问题

lovepp

.PHONY: all clean distclean install dist distfiles
.PHONY: $(SUBDIRS) $(SUBDIRS:%=%-clean) $(SUBDIRS:%=%-install)

clean: $(SUBDIRS:%=%-clean)

$(SUBDIRS:%=%-clean):
        $(MAKE) -C $(@:%-clean=%) clean

$(SUBDIRS:%=%-clean)是不是all-clean=all？