obj/HAL/src/alt_busy_sleep.o: HAL/src/alt_busy_sleep.c system.h linker.h \
  HAL/inc/alt_types.h HAL/inc/priv/alt_busy_sleep.h

system.h:

linker.h:

HAL/inc/alt_types.h:

HAL/inc/priv/alt_busy_sleep.h:
