各位大侠，请教个问题。我用mkimage命令失败，不知道什么原因呢？

[root@localhost boot]# ./mkimage -A arm -o linux -T kernel -C none -a 0x30008000 -e 0x30008040 -d zImage zImage.img
Usage: ./mkimage -l image
          -l ==> list image header information
       ./mkimage [-x] -A arch -O os -T type -C comp -a addr -e ep -n name -d data_file[:data_file...] image
          -A ==> set architecture to 'arch'
          -O ==> set operating system to 'os'
          -T ==> set image type to 'type'
          -C ==> set compression type 'comp'
          -a ==> set load address to 'addr' (hex)
          -e ==> set entry point to 'ep' (hex)
          -n ==> set image name to 'name'
          -d ==> use image data from 'datafile'
          -x ==> set XIP (execute in place)
       ./mkimage [-D dtc_options] -f fit-image.its fit-image
[root@localhost boot]# ls

./mkimage -A arm -o linux -T kernel -C none -a 0x30008000 -e 0x30008040 -d zImage zImage.img

应该是./mkimage -A arm -O linux -T kernel -C none -a 0x30008000 -e 0x30008040 -d zImage zImage.img吧。注意"-O"是大写的‘O’