Hallo!
I was trying to clean up my .pdrc file and didn't loading pdp... Now with PDP loading I am back to =>
/usr/lib/pd/extra/pix_2pdp.pd_linux: /usr/lib/pd/extra/pix_2pdp.pd_linux: undefined symbol: _ZN9CPPExtern10m_holdnameE
[...] okay, good news that pdp is working ... what you can try: do you really load gem before pix_2pdp ? I load it in that order: pd -lib pdp -lib Gem -lib pix_2pdp
if that does not help you will have to compile pix_2pdp yourself:
(you don't have to compile pdp - which makes it much easier ...;)
should not be that hard on a linux system ...
LG Georg