Compiling breaks at samba

Strange, Samba compiles fine here. Does it compile successfully without your lib2to3 changes?

Can you paste a link to all of your changes, and the exact command line you are using for your build?

My guess is that the problem is not actually with Samba, but that your changes have introduced a failure elsewhere (in another package) and the Samba package may be a collateral failure. Uploading your plan and history files would also be useful (you can find them in the "build.*/.threads" folder). In fact, zipping up the entire ".threads" folder and then uploading it somewhere would be very helpful as it would enable me to investigate the build failure.

Did you tried with my (updated) post_makeinstall_target() function for Python? It works here.

Previously I removed python lib too ( how stupid )

I assume vpeter is referring to his post in the thread you linked: this post. Without any visibility of the changes you are actually using, I'll let you sort it out with vpeter.

Yes, with this function Python and samba build fine. This time didn't test if addon actually works but I would say it does (like last time).