My expectation of how this should work:
- after applying the kernel patch, some optimizations of modern processors will be available;
- after forcibly setting the gcc optimization flags, all makefiles will be modified to use them;
- after executing
make localmodconfiga local hardware-specific .config file will be created; - after applying the template, some required drivers will be added from the template, and gcc will be forced to use the local processor optimization if it is recognized;
- a menu for manual configuration of the kernel will be executed and after exiting from it, the build process will be launched.
based on default Arch Linux Kernel build script
builded kernel will be tuned to local hardware and may not run on other hardware