SUBDIRS = src doc
RECURSIVE-TARGETS = default clean

$(RECURSIVE-TARGETS):
	@failcom='exit 1'; \
	list='$(SUBDIRS)'; for subdir in $$list; do \
		echo "Making $@ in $$subdir"; \
		(cd $$subdir && $(MAKE) $@) || eval $$failcom; \
	done; \
	test -z "$$fail"