Undefined symbol "pthread_create"?

[Laszlo Nagy]

I updated my ports tree 3 days ago, and did "portupgrade -a" 
successfuly. I'm trying to play an mp3 file with this command:

%padsp mpg123 test.mp3
High Performance MPEG 1.0/2.0/2.5 Audio Player for Layer 1, 2 and 3.
Version 0.59r (1999/Jun/15). Written and copyrights by Michael Hipp.
Uses code from various people. See 'README' for more!
THIS SOFTWARE COMES WITH ABSOLUTELY NO WARRANTY! USE AT YOUR OWN RISK!
/libexec/ld-elf.so.1: /usr/local/lib/libpulse.so.0: Undefined symbol 
"pthread_create"

Can it be that audio/pulseaudio is broken? Looks like a missing 
dependency or a missing patch ( -lpthread? ) of the source code.

Thanks,

   Laszlo