[MacPorts] #60328: qt5-qtbase @5.14.1 does not build on OSX 10.12

[MacPorts]

#60328: qt5-qtbase @5.14.1 does not build on OSX 10.12
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 Reporter:  michaelld  |      Owner:  (none)
     Type:  defect     |     Status:  new
 Priority:  Normal     |  Milestone:
Component:  ports      |    Version:
 Keywords:             |       Port:  qt5-qtbase
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 This is ''not'' a duplicate of https://trac.macports.org/ticket/60045.
 ... but it is related. Same basic issue, but in theory that was fixed! I
 have current base and ports tree. Trying to install qt5-qtbase on OSX
 10.12 results in trying to install 5.14.1 ... the build error will be the
 same as that other ticket, since both are trying to build an incompatible
 Qt5. Something must be borked with the logic determining which Qt5 version
 for this OS. qt5-qtbase works fine for OSX 10.9 through 10.15 otherwise,
 so the issue is -just- OSX 10.12.

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Ticket URL: <https://trac.macports.org/ticket/60328>
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