SUBDIRS = 16x16 22x22 24x24 32x32 48x48 scalable all: subdirs subdirs: @for i in $(SUBDIRS); do (cd $$i && $(MAKE)) || exit; done clean: @for i in $(SUBDIRS); do (cd $$i && $(MAKE) clean) || exit; done distclean: @for i in $(SUBDIRS); do (cd $$i && $(MAKE) distclean) || exit; done install: @for i in $(SUBDIRS); do (cd $$i && $(MAKE) install) || exit; done uninstall: @for i in $(SUBDIRS); do (cd $$i && $(MAKE) uninstall) || exit; done .PHONY: all subdirs clean distclean install uninstall