usage:;cat Makefile

test: export PATH := "$(PWD)/bin:$(PATH)"
test:
	@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++ )); \
		done