[MacPorts] #67922: macports-libcxx does not support +universal on Intel?

[MacPorts]

#67922: macports-libcxx does not support +universal on Intel?
------------------------------+----------------------
  Reporter:  barracuda156     |      Owner:  kencu
      Type:  defect           |     Status:  assigned
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.8.1
Resolution:                   |   Keywords:
      Port:  macports-libcxx  |
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Comment (by ryandesign):

 The macports-libcxx port is weird. It doesn't build anything; it just
 copies and installs files that were installed by the clang-11 port. So
 macports-libcxx's architectures and universality depend on the archs and
 universality for which the clang-11 port was installed. This does not seem
 great.

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Ticket URL: <https://trac.macports.org/ticket/67922#comment:1>
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