[MacPorts] #56172: LyX @2.3.0_0: fatal error: 'QPdfWriter' file not found

[MacPorts]

#56172: LyX @2.3.0_0: fatal error: 'QPdfWriter' file not found
-----------------------+----------------------------
  Reporter:  iqgrande  |      Owner:  kurthindenburg
      Type:  defect    |     Status:  assigned
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.4.2
Resolution:            |   Keywords:
      Port:  LyX       |
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Comment (by kencu):

 Perhaps the new version 2.3.x series no longer supports
 qt4:[https://git.lyx.org/?p=lyx.git;a=blob_plain;f=lib/RELEASE-
 NOTES;hb=4d5e926f0af01960460480812ae3d5efdf5bc9c7 Release Notes]
 {{{
 !!Changes with respect to external programs and libraries in 2.3:

 * LyX now supports only macOS 10.9 and higher (due to using Qt 5.9).
 }}}

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Ticket URL: <https://trac.macports.org/ticket/56172#comment:8>
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