make ARCH=arm CROSS_COMPILE=arm-linux-musleabihf- uImage modules
  CHK     include/linux/version.h
  CHK     include/generated/utsrelease.h
make[1]: `include/generated/mach-types.h' is up to date.
  CALL    scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  CHK     kernel/config_data.h
  CC      drivers/gpu/mali/mali/linux/mali_osk_atomics.o
  CC      drivers/gpu/mali/mali/linux/mali_osk_locks.o
  CC      drivers/gpu/mali/mali/linux/mali_osk_math.o
  CC      drivers/gpu/mali/mali/linux/mali_osk_memory.o
  CC      drivers/gpu/mali/mali/linux/mali_osk_misc.o
  LD      drivers/gpu/mali/mali/mali.o
  LD      drivers/gpu/mali/mali/built-in.o
  CC      drivers/gpu/mali/ump/../mali/linux/mali_osk_atomics.o
  CC      drivers/gpu/mali/ump/../mali/linux/mali_osk_locks.o
  CC      drivers/gpu/mali/ump/../mali/linux/mali_osk_memory.o
  CC      drivers/gpu/mali/ump/../mali/linux/mali_osk_math.o
  CC      drivers/gpu/mali/ump/../mali/linux/mali_osk_misc.o
  LD      drivers/gpu/mali/ump/ump.o
  LD      drivers/gpu/mali/ump/built-in.o
  Kernel: arch/arm/boot/Image is ready
  Kernel: arch/arm/boot/zImage is ready
  Image arch/arm/boot/uImage is ready
  Building modules, stage 2.
  MODPOST 42 modules
ERROR: "ump_dd_secure_id_get" [drivers/video/sunxi/disp/disp_ump.ko] undefined!
ERROR: "ump_dd_handle_create_from_phys_blocks" [drivers/video/sunxi/disp/disp_ump.ko] undefined!
make[1]: *** [__modpost] Error 1
make: *** [modules] Error 2