What value puts Jam in its builtin variable $(OS) on QNX Neutrino hosts?

Question

I have to configure my compilation depending on build hosts. Windows and Linux are easy and I have access to the build hosts to test it myself anyway.

What I have so far completely failed to find are the values of $(OS) and, just to check my expectations, $(OSPLAT). I assume OSPLAT to be X86 on x86 machines, similar to other QNX supported SDP packages

If anyone has access to a QNX/Neutrino system with installed QNX SDP, the Jam script below can produce the result:

Echo $(OS) $(OSPLAT) ;

Answer 1

I had a look at Jam source and it seems that depending on the platform version it is either QNX or QNXNTO. See jam.h for more details and OSPLAT values.