TARGETS += techlibs/blackbox.v techlibs/blackbox.v: techlibs/blackbox.sed techlibs/simlib.v techlibs/stdcells_sim.v cat techlibs/simlib.v techlibs/stdcells_sim.v | sed -rf techlibs/blackbox.sed > techlibs/blackbox.v.new mv techlibs/blackbox.v.new techlibs/blackbox.v