The one-pager for this project says (in section 3.6) that it doesn't duplicate core Solaris components. But the description of the Pth library provided by this case sure sounds like it is trying to duplicate the behavior of the Solaris pthread library and major chunks of basic libc functions like read[v] and write[v].
Why shouldn't this be considered a duplication of the core Solaris POSIX threads features even though it adds a "pth_" to the front of a bunch of standard function names? - Don