[MacPorts] #57156: wgrib2 fails to build on Mac OS X 10.11.6

[MacPorts]

#57156: wgrib2 fails to build on Mac OS X 10.11.6
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  Reporter:  yurukc  |      Owner:  tenomoto
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  wgrib2  |
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Comment (by yurukc):

 When I type "xcode-select -print-path" command, it shows
 **/Library/Developer/CommandLineTools** path. \\
 However, the command "xcodebuild -version" gives error that is xcode-
 select: error: tool 'xcodebuild' requires Xcode, but active developer
 directory '/Library/Developer/CommandLineTools' is a command line tools
 instance.

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Ticket URL: <https://trac.macports.org/ticket/57156#comment:2>
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