[MacPorts] #67940: GrandPerspective fails to build Mojave and older

[MacPorts]

#67940: GrandPerspective fails to build Mojave and older
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  Reporter:  thomasrussellmurphy  |      Owner:  amake
      Type:  defect               |     Status:  assigned
  Priority:  Normal               |  Milestone:
 Component:  ports                |    Version:
Resolution:                       |   Keywords:
      Port:  GrandPerspective     |
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Comment (by wltb):

 [https://grandperspectiv.sourceforge.net/ Upstream] has a list that shows
 which macOS versions are supported by the various versions (under ''System
 requirements''). This could be solved like the ''mkvtoolnix'' port
 [https://github.com/macports/macports-
 ports/blob/master/multimedia/mkvtoolnix/Portfile does it], check
 ''${os.major}'' and provide older versions for older OSes.

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Ticket URL: <https://trac.macports.org/ticket/67940#comment:6>
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