[MacPorts] #67742: PothosFlow: builds fail across-the-board: undefined symbols related to libcxx: allocator<>, basic_string<>, etc

[MacPorts]

#67742: PothosFlow: builds fail across-the-board: undefined symbols related to
libcxx: allocator<>, basic_string<>, etc
-------------------------+----------------------
  Reporter:  mascguy     |      Owner:  ra1nb0w
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.8.1
Resolution:              |   Keywords:
      Port:  PothosFlow  |
-------------------------+----------------------

Comment (by ra1nb0w):

 thank you for the report. It is related to https://github.com/macports
 /macports-ports/pull/19424

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Ticket URL: <https://trac.macports.org/ticket/67742#comment:1>
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