[MacPorts] #57143: $port $version [$variants]: Unable to determine location of a macOS SDK

[MacPorts]

#57143: $port $version [$variants]: Unable to determine location of a macOS SDK
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  Reporter:  ivanatina  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  1.7.0
Resolution:             |   Keywords:
      Port:             |
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Comment (by raimue):

 Xcode has provided the very latest SDK only for quite a while already. So
 using the 10.(X+1) SDK on 10.X is not unheard of. Did you also install the
 latest Command Line Tools?

 Could you provide a `main.log` showing the failure? Please be more
 specific with which port you encountered this problem and please try to
 provide steps to reproduce the issue.

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Ticket URL: <https://trac.macports.org/ticket/57143#comment:8>
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