[MacPorts] #12794: MacPorts should warn of old Xcode versions

[MacPorts]

#12794: MacPorts should warn of old Xcode versions
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  Reporter:  ryandesign at macports.org  |       Owner:  macports-tickets at lists.macosforge.org
      Type:  defect                   |      Status:  new                                  
  Priority:  Normal                   |   Milestone:  MacPorts base enhancements           
 Component:  base                     |     Version:  1.5.2                                
Resolution:                           |    Keywords:                                       
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Comment (by ryandesign at macports.org):

 A runtime Xcode version check would have helped resolve #16213 much
 quicker.

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Ticket URL: <http://trac.macports.org/ticket/12794#comment:8>
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