I just upgraded to FreeBSD 8 from 7.2, and things went basically smoothly. I ran freebsd-update; I'm currently rebuilding all the installed ports with portupgrade -af, things are going well. However, I have several service jails on this machine, configured according to the handbook (http://www.freebsd.org/doc/handbook/jails-application.html), and I need to upgrade them as well. Step one is to go to /usr/src and make buildworld and then make installworld to my shared jail environment. However, I am unable to do this; I get this error during buildworld: Code:... cc -O2 -pipe -I/usr/obj/usr/src/tmp/legacy/usr/include -c /usr/src/games/fortune/strfile/strfile.c cc -O2 -pipe -I/usr/obj/usr/src/tmp/legacy/usr/include -static -L/usr/obj/usr/src/tmp/legacy/usr/lib -o strfile strfile.o -legacy strfile.o(.text+0x895): In function `main': : undefined reference to `arc4random_uniform' *** Error code 1 Stop in /usr/src/games/fortune/strfile. *** Error code 1 Stop in /usr/src. *** Error code 1 Stop in /usr/src. *** Error code 1 Stop in /usr/src. I have been googling for a long time about this, and have found lots of copies of another person running into this, but no answers. I updated my source tree with csup; I used the standard-supfile from the examples with a nearby mirror; I get the same error, same place. Can anybody help me out with this? It seems like this should just work, I haven't modified anything and I'm running the generic kernel. Thanks for any help! PS: Does freebsd-update update the source tree automatically, or do I need to run the seperate csup to do that?