quoted

There seem to be two viable approaches to handling this:

1. Expect the platform to provide POSIX semantic (through an external
    ...

I'd prefer not to see this be a requirement of the platform. There have
been multiple attempts over the years to provide a POSIX surfaces
on Windows which arguably haven't been that successful.

+1
'viable' was the wrong word - I can't see a general-purpose POSIX 
surface giving a good outcome.

It would be helpful if DPDK dependence on POSIX APIs were limited to
be only as necessary to improve portability to non-POSIX platforms.