[Openmp-dev] CMake overhaul

[C Bergström]

At a quick glance  - did you remove support for FreeBSD?
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In regards to Chandlers questions

liboffload absolute does not belong inside libomp. Any reference to it
is likely Intel legacy. They should work together, but liboffload is
something which IMHO should be used by other programming models and
not tightly coupled only to OMP.

(OpenCL, C++AMP, CUDA. etc)