2016-09-17 5:00 GMT-03:00 Derek Kwan <derek.x.kwan@gmail.com>:
> On first glance, it looks like 0.2beta has pthread stuff that
> 0.1-alpha55 has...

0.2beta has pthread stuff that 0.1-alpha55 DOESN'T HAVE, sorry for the typo

alpha 55 is the one present in Pd Extended 0.42-5
 
As I said, alpha 56, present in Pd Extended 0.43-4 doesnt have it either.

So this was either introduced in alpha 57 or 0.2 beta, but now seems to have been removed from the latest build