Makefile

mode=debug

submake = build/$(mode)/Makefile

all clean: $(submake)
	$(MAKE) -C $(dir $(submake)) $@

$(submake): Makefile
	mkdir -p $(dir $@)
	echo 'mode = $(mode)' > $@
	echo 'src = ../..' >> $@
	echo 'VPATH =../..' >> $@
	echo 'include ../../build.mak' >> $@