Build only changes

[Alexander Kuleshov]

Hello Slawa,

On Mon, Nov 30, 2015 at 6:09 PM, Slawa Olhovchenkov <slw at zxy.spb.ru> wrote:
>
> May be `make buildworld -DNO_CLEAN` is enough?
>
> For some dirs I am do direct build. For other this is not work.

Thank you for reply, but anyway it's too long to wait. Would great to have
options for skipping contrib/, usr.bin/ and other non-related to
changes directories,
but unfortunately didn't see it in Makefiles.

Thank you again.