usage:;cat Makefile

test:
	@export PATH="$(CURDIR)/bin:$(PATH)"; \
		tests="`find t -type f -executable`"; \
		i=1; \
		n=`echo "$$tests" | wc -l`; \
		echo $$i..$$n; \
		for exe in $$tests; do \
			{ \
				./$$exe; \
				case $$? in 0) result=ok;; *) result='not ok';; esac; \
				echo $$result $$i - $$exe; \
			} & \
			i=$$(( i+1 )); \
		done; \
		wait