DEFINES+= just means 'add to the end of DEFINES' - so if you've set DEFINES to something before running make then you should be fine ;)
DEFINES+=
make
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
DEFINES+=
just means 'add to the end of DEFINES' - so if you've set DEFINES to something before runningmake
then you should be fine ;)