CPU_CORE = cortex-m33 MCU_VARIANT = nrf5340_application CFLAGS += -DNRF5340_XXAA -DNRF5340_XXAA_APPLICATION LD_FILE = hw/mcu/nordic/nrfx/mdk/nrf5340_xxaa_application.ld SRC_C += hw/mcu/nordic/nrfx/drivers/src/nrfx_usbreg.c # caused by void SystemStoreFICRNS() (without void) in system_nrf5340_application.c CFLAGS += -Wno-error=strict-prototypes # flash using jlink JLINK_DEVICE = nrf5340_xxaa_app flash: flash-jlink