[MacPorts] #68490: Unable to upgrade libomp @17.0.3 -- Build Failed -- clang 3.7 missing atomic support

[MacPorts]

#68490: Unable to upgrade libomp @17.0.3 -- Build Failed -- clang 3.7 missing
atomic support
---------------------+--------------------
  Reporter:  RobK88  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.8.1
Resolution:          |   Keywords:
      Port:  libomp  |
---------------------+--------------------

Comment (by RobK88):

 P.S.  Given that `clang-3.7` appears to lack atomic support, I do not know
 whether `libomp` will work properly with recently installed `clang-3.7`.
 (I really do not understand how `libomp` interacts with `clang-3.7`).  Any
 thoughts?

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Ticket URL: <https://trac.macports.org/ticket/68490#comment:1>
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