Dimitry Andric 991f6e7534 For llvm's internal function which retrieves the number of available
"hardware threads", use cpuset_getaffinity(2) on FreeBSD, so it will
honor processor sets configured by the cpuset(1) command.

This should make it possible to avoid e.g. lld creating a huge number of
threads on a machine with many cores, even for linking simple programs.

This will also be submitted upstream.

Submitted by:	mjg
MFC after:	1 week
2020-11-18 19:55:24 +00:00
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