help:
	$(info The following make targets are available:)
	@$(MAKE) -f $(firstword $(MAKEFILE_LIST)) --print-data-base --question no-such-target 2>&1 | grep -v 'no-such-target' | \
	grep -v -e '^no-such-target' -e '^makefile' | \
	awk '/^[^.%][-A-Za-z0-9_]*:/	{ print substr($$1, 1, length($$1)-1) }' | sort -u
.PHONY: help