[MacPorts] #61584: Use deployment target 10.16 on Big Sur

[MacPorts]

#61584: Use deployment target 10.16 on Big Sur
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  Reporter:  ryandesign   |      Owner:  (none)
      Type:  enhancement  |     Status:  new
  Priority:  High         |  Milestone:  MacPorts 2.7.0
 Component:  base         |    Version:  2.6.4
Resolution:               |   Keywords:  bigsur
      Port:               |
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Comment (by ryandesign):

 Users could edit macports.conf sure, but I'm talking about modifying
 MacPorts base code to change the default value of the deployment target on
 macOS 11.

 The deployment target has nothing to do with the SDK version, as far as
 MacPorts base code goes.

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Ticket URL: <https://trac.macports.org/ticket/61584#comment:4>
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