ifneq (0,$(GNRC_IPV6))
  ifneq (0,$(USE_LWIP))
    $(error No valid choice: Select either LWIP or GNRC)
  endif
  USEMODULE += auto_init_gnrc_netif
  # Activate ICMPv6 error messages
  USEMODULE += gnrc_icmpv6_error
  # Specify the mandatory networking modules for IPv6
  USEMODULE += gnrc_ipv6_default
  # Additional networking modules that can be dropped if not needed
  USEMODULE += gnrc_icmpv6_echo
else
  ifeq (0,$(USE_LWIP))
    $(error No network stack selected. Please choose either GNRC or LWIP)
  endif
endif