[MacPorts] #47564: port upgrade fails with error for package gmp

[MacPorts]

#47564: port upgrade fails with error for package gmp
-------------------------+--------------------------------
  Reporter:  vithlani@…  |      Owner:  macports-tickets@…
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.3
Resolution:              |   Keywords:
      Port:              |
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Comment (by ryandesign@…):

 Replying to [comment:6 vithlani@…]:
 > {{{
 > $ sudo xcode-select --switch /Applications/Xcode.app
 > Password:
 > xcode-select: error: invalid developer directory
 '/Applications/Xcode.app'
 > }}}

 Correct, that's invalid. We should have instead asked you to run (and
 please run this now):

 {{{
 sudo xcode-select --switch /Applications/Xcode.app/Contents/Developer
 }}}

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Ticket URL: <https://trac.macports.org/ticket/47564#comment:8>
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