"minimal" is also called "single process". The system is required to
provide threads, timers, and rt signals, plus semaphores.
"multi" is what people think of: sched_setsched, mlock, +basic nonrt
posix. It seems like LynxOS and VxWorks people insistet on a minimal
standard so that they could claim POSIX conformance without adding all
that junk.
If you want, I can scan in an email you the key pages.
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