[MacPorts] #69406: build shared-mime-info for deployment target 10.14 fails on macOS Sonoma

[MacPorts]

#69406: build shared-mime-info for deployment target 10.14 fails on macOS Sonoma
-------------------------------+----------------------
  Reporter:  MStraeten         |      Owner:  mascguy
      Type:  defect            |     Status:  assigned
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:  2.9.1
Resolution:                    |   Keywords:
      Port:  shared-mime-info  |
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Comment (by mascguy):

 Replying to [comment:3 kencu]:
 > There are many many many ways in which the logic in `legacysupport` and
 it's supporting ports, such as `macports-libcxx`, can be shown to work
 inadequately when building for an older deployment target.

 Yes indeed, and that's the tricky part with this: Portgroup
 `legacysupport` determines the macOS version via `os.major`, rather than
 `macosx_deployment_target`.

 And we don't want to risk changing the latter's logic - at least not in
 terms of the default behavior - as it could cause unforeseen issues
 elsewhere. So perhaps we need to add a new opt-in flag for pg
 `legacysupport`, which enables use of `macosx_deployment_target`.

 But per Ken's point, even with such a change in place, there could still
 be other areas that fail to use the latter [for determining the macOS
 version].

 So there may not be much we can do at this point, barring a more extensive
 audit of the various code paths.

 Thoughts?

-- 
Ticket URL: <https://trac.macports.org/ticket/69406#comment:5>
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