[GEM-dev] pb to compil pdgst on ubuntu studio 12.04

[puredata at 11h11.com]

Good news!

Using Debian to compile pdgst.pd_linux = working!

I am now able to use gstreamer inside pd to stream to justin.tv:
http://www.youtube.com/watch?v=SD6s2xeMB1w

Next thing is to stream something from gem / pix, but i get this error:
/usr/lib/pd/extra/pix_pix2gst.pd_linux:  
/usr/lib/pd/extra/pix_pix2gst.pd_linux: undefined symbol:  
_ZN9CPPExternaSERKS_

I really need help on this one.
Thanks