CMUCL FreeBSD -lc_r

This looks good:

$ freebsd4/lisp/lisp -core freebsd4/lisp/lisp.core -noinit -nositeinit
...
Loaded subsystems:
    Python 1.1, target Intel x86
    CLOS based on Gerd's PCL 2004/04/14 03:32:47
* (+ 3 4)

7
* 

This doesn't:

* (load (translate-logical-pathname "pkg:asdf"))
...
...
; [GC threshold exceeded with 15,666,920 bytes in use.  Commencing GC.]
Help! 12 nested errors.  KERNEL:*MAXIMUM-ERROR-DEPTH* exceeded.

Debug  (type H for help)

(UNIX::SIGBUS-HANDLER # # #.(SYSTEM:INT-SAP #x47FD6448))
Source: 
; File: target:code/signal.lisp

0] H
(DEFINE-SIGNAL-HANDLER SIGBUS-HANDLER "Bus Error")

I rebuilt lisp without the -pthread option and it appears to work just like the regular binary installation I have.

Now what? Hmmm, SBCL is a derivative of CMUCL. Maybe... perhaps...