as described in jail(8), I tried to do a "make all" in /usr/src, but it
failed as follows:
I've never used a "make all" from /usr/src. I was always told to do a
"make buildworld" or "make world". If you are updating from 4.0, you
should pay attention to /usr/src/UPDATING. You will have much less
trouble if you build the world and the kernel that way.