Setiathome register problem -- I can't remember what is missing

[Tom Parquette]

Please CC me.  I do not subscribe to ports.  TIA.
I had a machine go down with a hard drive failure that I rebuilt from 
scratch.
This machine is a stripped down installation that simply catches back up 
files so they can be burned to CD.
I recently noticed that setiathome was not running there.  I make 
deinstall/make reinstall the port then went to redo the register and I 
got the following error:
Callimachus# /usr/local/etc/rc.d/setiathome.sh register
setiathome:*:1007:
You already have a group "setiathome", so I will use it.
setiathome:*:1013:1007::0:0:SETI at home 
Daemon:/var/db/setiathome:/sbin/nologinYou already have a user 
"setiathome", so I will use it.
Changed home directory of "setiathome" to "/var/db/setiathome"
/usr/libexec/ld-elf.so.1: Shared object "libc.so.4" not found
Callimachus#

I know I have seen this before and there was a port missing.  I tried 
searching questions and ports and I didn't find anything usable.  I 
cannot remember what it was I did to fix this in the past.

I can read and understand (to some degree) simple Makefiles.  Enough to 
pick out the install and runtime dependencies.  There does not appear to 
be dependencies listed for this port.

Any help would be appreciated.
Thanks...