# Define the module that is built:
  MODULE = cpu
  
  # Add a list of subdirectories, that should also be built:
  DIRS = periph $(RIOTCPU)/cortexm_common
  
  # cc2538_rf radio driver
  ifneq (,$(filter cc2538_rf,$(USEMODULE)))
      DIRS += radio
  endif
  
  # (file triggers compiler bug. see #5775)
  SRC_NOLTO += vectors.c
  
  include $(RIOTBASE)/Makefile.base