## Requirements
  
  - currently, the host side only compiles on Linux
  
  ## Usage
  
  To use, add
  
      #
      GNRC_NETIF_NUMOF := 2
      USEMODULE += ethos gnrc_netdev
      CFLAGS += '-DETHOS_UART=UART_DEV(0)' -DETHOS_BAUDRATE=115200 -DUSE_ETHOS_FOR_STDIO
  
  to app Makefile, "make clean all flash", then run this tool so follows:
      # sudo ./ethos <tap-device> <serial>