Here is a list of all macros with links to the files they belong to:

EVENT_BITS : EventCPP.h
EVENT_MASK : EventCPP.h
FREERTOS_USE_NAMESPACE : FreeRTOScpp.h
FREERTOS_VERSION_ALL : FreeRTOScpp.h
FREERTOSCPP_USE_CHRONO : FreeRTOScpp.h
FREERTOSCPP_USE_NAMESPACE : FreeRTOScpp.h