ifeq ($(S),)
S = .
endif

_all: all

all clean install uninstall:
	@for i in $(SUBDIRS) ; do \
		echo "== $$i"; \
		mkdir -p $(BUILDDIR)/$(S)/$$i; \
		$(MAKE) -C $(BUILDDIR)/$(S)/$$i \
			-f $(SRCDIR)/$(S)/$$i/Makefile \
			S=$(S)/$$i $@ || exit $$? ; \
	done

.PHONY: _all all clean install uninstall