pd -jack -rt -lib xxx" never works (pd does not start and you get a watchdog message signaling Pd in the console)
This is the anwser I got on the archive :
"Pd effectively tries to make its main thread the "real-time" one. If you stick hard-core computations in the main thread, as GEM does, this can have a bad effect on your machine. THis is why "-rt" and GEM disagree with each other on OSX - and I suppose on linux as well although I don't know that." (Miller Puckette)
Actually I was first wrong, as some libraries work on my computer with the "-rt" flag : Iemlib, zexy, chaos, Gem (so this one seems to work on Linux in realtime mode). Some others don't work, like fftease and vasp (wtachdog).
Sorry for the confusion
-j