mkimage command not found - U-Boot images will not be built

Ubuntu 16.04.2 compiler environment arm-linux3.4.5 linux-2.6.22.6

  In compiling linux-2.6.22.6 version of the kernel source code, according to their own board need to patch after patch, a default configuration, then the need for

myroot@myroot:~/system/kernel/linux-2.6.22.6$ make uImage

When, before compiling part of the normal, but in the end appeared

"mkimage" command not found - U-Boot images will not be built 

mkimage command not found, indicating that we are missing some dependencies, so I try to install the dependencies as follows

sudo apt-get install uboot-mkimage 

But it appeared the following error

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

E: Package 'uboot-mkimage' has no installation candidate

This error message indicates that we need to install the u-boot-tools dependencies, so it is necessary to do the following

sudo apt-get install u-boot-tools 

After installation is complete again

sudo apt-get install uboot-mkimage 

Normally installed the dependencies should be, but there is still the same as the above tips and error messages, install the u-boot-tools after dependencies, or

prompt

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

E: Package 'uboot-mkimage' has no installation candidate

After a lot of trying to find solutions can not solve, and finally found uboot source compiler, in its

u-boot-1.1.6/tools/

There mkimage executable files in the directory! So we were

sudo cp mkimage /bin/ 

Then again the main kernel directory where the Makefile again

myroot@myroot:~/system/kernel/linux-2.6.22.6$ make uImage

prompt

  Image arch/arm/boot/uImage is ready

Successfully generated uImage file! problem solved!

among them

sudo cp mkimage /bin/ 

Can also be copied to / usr / bin / or other existing directory path (bin /), files in general / bin / directory for tools and system-related, so it is best placed in the official catalog other as described above, Although trouble spots, but it helps to develop good habits, but now there is no so much a practice session -

The solution to this problem has given me a new way of thinking, in addition to direct download dependencies, you can also use direct copy directly to the tool, which actually did not think the delay in the windows linux here will think of the idea, so the thinking there is still much room for improvement ???

Welcome to exchange, discuss or correct me! Common progress!