Automatic building of .deb packages?

Question

linux

How the question came up: I recently realized that packages for ubuntu are built with support for older machines. After rebuilding the kernel with optimization for my processor, I noticed that the computer began to work very noticeably faster.
So, at the same time, I have no desire to switch to Genta, despite the fact that, in principle, I get along well with Linux.
So, I have no desire to rebuild all packages at all when updating, only some that I use especially often (chromium or transmission, for example).
Connoisseurs, attention, question: is there a tool that would work according to the following algorithm:
1) I mark the packages that the software would monitor
2) As soon as synaptic finds updates to one of these packages, it does not download the package itself, but its source code.
3) After receiving the package, the package should automatically build into a deb package, taking into account optimizations
4) The package is installed so that it is visible to synaptic, and waits for updates, after which the procedure is repeated
So, does such a tool exist?

Answer 1

apt build.

Answer 2

I don’t know if there is such a tool specifically - in principle, you can build it yourself, but in a more general case, you can adapt some kind of continuous integration server for these purposes ...

Answer 3

Gentoo