drivers/staging/gdm724x/Makefile - linux - Git at Google

 obj-$(CONFIG_LTE_GDM724X) := gdmulte.o
 gdmulte-y += gdm_lte.o netlink_k.o
 gdmulte-y += gdm_usb.o gdm_endian.o

 obj-$(CONFIG_LTE_GDM724X) += gdmtty.o
 gdmtty-y := gdm_tty.o gdm_mux.o
	obj-$(CONFIG_LTE_GDM724X) := gdmulte.o
	gdmulte-y += gdm_lte.o netlink_k.o
	gdmulte-y += gdm_usb.o gdm_endian.o

	obj-$(CONFIG_LTE_GDM724X) += gdmtty.o
	gdmtty-y := gdm_tty.o gdm_mux.o