INCLUDES += -I$(RIOTBASE)/pkg/lwip/include \
            -I$(PKGDIRBASE)/lwip/src/include

ifneq (,$(filter lwip_contrib,$(USEMODULE)))
  DIRS += $(RIOTBASE)/pkg/lwip/contrib
endif
ifneq (,$(filter lwip_netdev,$(USEMODULE)))
  DIRS += $(RIOTBASE)/pkg/lwip/contrib/netdev
endif
ifneq (,$(filter lwip_sock,$(USEMODULE)))
  ifneq (,$(filter lwip_ipv6,$(USEMODULE)))
    CFLAGS += -DSOCK_HAS_IPV6
  endif
  DIRS += $(RIOTBASE)/pkg/lwip/contrib/sock
endif
ifneq (,$(filter lwip_sock_ip,$(USEMODULE)))
  DIRS += $(RIOTBASE)/pkg/lwip/contrib/sock/ip
endif
ifneq (,$(filter lwip_sock_tcp,$(USEMODULE)))
  DIRS += $(RIOTBASE)/pkg/lwip/contrib/sock/tcp
endif
ifneq (,$(filter lwip_sock_udp,$(USEMODULE)))
  DIRS += $(RIOTBASE)/pkg/lwip/contrib/sock/udp
endif