[MacPorts] #63647: detect when user has not opened Xcode to perform installation of additional components (was: graphviz-gui fails to install because of missing CoreSimulator)

[MacPorts]

#63647: detect when user has not opened Xcode to perform installation of additional
components
--------------------------+--------------------
  Reporter:  reynoldsnlp  |      Owner:  (none)
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:  2.7.1
Resolution:               |   Keywords:
      Port:               |
--------------------------+--------------------
Changes (by ryandesign):

 * keywords:  CoreSimulator =>
 * component:  ports => base
 * port:  graphviz-gui =>


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Ticket URL: <https://trac.macports.org/ticket/63647#comment:2>
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