Developers run make under linux (need to install gcc, make) or windows(neet to install minGW), after the success of the executable file mkbootimg / unpackbootimg.
1.unpackbootimg
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1.1 usage:
-i|--input boot.img
[ -o|--output output_directory]
[ -p|--pagesize ]
1.2 example:
./unpackbootimg -i boot.img -o boot
2.mkbootimg
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2.1 usage
--kernel
--ramdisk
[ --second ]
[ --cmdline ]
[ --board ]
[ --base]
[ --pagesize ]
[ --ramdiskaddr]
-o|--output
2.2 exapmle
./mkbootimg --cmdline 'no_console_suspend=1 console=null' --kernel zImage --ramdisk boot/boot.img-ramdisk.gz -o boot.img --base 02e00000 --ramdiskaddr 0x81508000