eg25-g/kernel/kernel-4.9-spiri/drivers/net/usb/Makefile

subdir-ccflags-y += -Werror

obj-$(CONFIG_VIDEO_I2C_SPIRI_GSM)  += GobiNet.o
GobiNet-objs := GobiUSBNet.o QMIDevice.o QMI.o

ccflags-y += -I$(srctree)/drivers/net/usb
ccflags-y += -I$(srctree)/drivers/usb/serial/