i think it is possible but not yet released by anybody. Had talk with a develloper about this, i was asking him if it could reduce process charge to compile a version of a patch for having it available in pd as a closed to edit compiled version, he tell me that is possible to devellope something that do the job. I don't know if there is any project around this purpose now.
Could be the next killer function for PD, compiling in one click in vst .dll format, .so LADSPA, .exe standalone, .dll or .so externs for pd.
I had found a little java prog that convert .pd in .dll externs back in the day, but i have loose it, if someone have the url.