downloads u-boot 

from official site. I do a compilation on the documentation and at the end an error occurs. I'm trying to optimize the code. nothing comes out. where to turn, who can exactly answer my questions?

 

4 hours ago, armpc said:

downloads u-boot 

from official site.

We use official u-boot in case it works better than vendors dirty hacked old u-boot.  I would suggest starting with our build tools since it will save you a lot of hassle. You start with something that works and u-boot made this way is installable as any Debian package. It will prepare optimal build environment. Use parameter CREATE_PATCHES="yes" and then do whatever with the u-boot code. When you are done a patch is generated. Repeat that until you are satisfied. Then either send that patch upstream, to us or to Denx or just use it when building u-boot for your needs.

 

guys thanks

I hope that I can