ubuntu 16.04 64位系统编译linux kernel时提示：

“mkimage” command not found – U-Boot images will not be built

按照提示，我们需要安装依赖包：

sudo apt-get install uboot-mkimage

Building dependency tree      
Reading state information... Done
Package uboot-mkimage is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
However the following packages replace it:
  u-boot-tools:i386 u-boot-tools

按照其提示，安装”u-boot-tools“即可

sudo apt-get install u-boot-tools