What threading library does POV-Ray use for the 3.7 SMP beta?  I was 
looking at OpenMP recently, until I found out that VC Express doesn't 
support it (and I don't have $300 for the Pro version) {funny they don't 
mention that explicitly ANYWHERE, even though the "Project Options" have 
an option to enable it}.  That started me looking for a different 
library, which turned up pthreads, Pth, Zth, Ptr, and a few others.

This question could be considered off-topic, but as POV-Ray is one of 
the best pieces of software I know of, and recently began to be 
threaded, I thought it would be useful to get the developers' views on 
threading and the available libraries.

...Chambers

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