[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:  barracuda156
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.8.1
Resolution:              |   Keywords:
      Port:  PothosFlow  |
-------------------------+--------------------------

Comment (by barracuda156):

 UPD. I add correct flags for GCC build here: https://github.com/macports
 /macports-ports/pull/19636
 However, this – as well as https://github.com/macports/macports-
 ports/pull/19424 – affects ''only'' GCC builds. So I cannot see how that
 could possibly have broken any dependencies on Intel.

 I would assume that Macports switched to a newer Clang, or a newer Qt5, or
 something of the sort, which is incompatible with the old `PothosFlow`
 which we have. Judging by commit history with upstream, currently Qt6 is
 supported. Maybe just update all Pothos* ports to current versions?
 (PPC does not work at the moment anyway, no need to be concerned about it.
 I will raise the issue with upstream and see if they suggest something.)

-- 
Ticket URL: <https://trac.macports.org/ticket/67742#comment:5>
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