xmms libpthread

[bruno malag]

FreeBSD 5.2-CURRENT #0: Wed Feb 18 00:02:18 EST 2004
x86
After building the xmms port I attempt to run xmms and get the following 
error:-
Fatal error 'Spinlock called when not threaded.' at line 83 in file /usr/src/
lib/libpthread/thread/thr_spinlock.c (errno = 0)
Abort (core dumped)

I understand that I may have to map another library to pthread in 
libmap.conf .
If this is right which library do I need to map to pthread in libmap.conf ?

Bruno