[MacPorts] #70655: Qt6-qtbase, missing #include and an issue for (some) older systems

[MacPorts]

#70655: Qt6-qtbase, missing #include and an issue for (some) older systems
-------------------------+---------------------------------
  Reporter:  Gandoon     |      Owner:  MarcusCalhoun-Lopez
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.10.1
Resolution:              |   Keywords:
      Port:  qt6-qtbase  |
-------------------------+---------------------------------

Comment (by Gandoon):

 I have an update to the adjacent `qt6-qtdeclarative` issue I hinted at
 previously exists for MacOS 10.15 (and probably older).

 Qt 6.7 development tools are unfortunately
 [https://doc.qt.io/qt-6/macos.html not officially supported] on MacOS
 10.15 and earlier. However, as far as I can tell, deployment on older
 systems still is. It is possible to patch the source to build on 10.15 and
 to build applications using it (`qBittorrent` being a test case for me).
 Due to not being supported, it is unclear if everything will work as
 intended, but for me it worked. The latest version of qBittorrent seems to
 depend on Qt 6.7, so I had an incentive to try to find a patch.

 Would there be any interest in me opening a separate ticket for that port
 and post the patch suggestion there? It requires a manual adjustment to
 make sure a certain destructor is correctly declared and used. We shall
 see if I have any memory left when I am done here ;)

-- 
Ticket URL: <https://trac.macports.org/ticket/70655#comment:7>
MacPorts <https://www.macports.org/>
Ports system for macOS