ender-marlin/buildroot/bin/opt_add

#!/usr/bin/env bash

eval "echo '#define ${@}' | cat - Marlin/Configuration.h > temp && mv temp Marlin/Configuration.h"
	`#!/usr/bin/env bash`

	`eval "echo '#define ${@}' \| cat - Marlin/Configuration.h > temp && mv temp Marlin/Configuration.h"`