[MacPorts] #59837: port incorrectly thinks Xcode command line tools are not installed

[MacPorts]

#59837: port incorrectly thinks Xcode command line tools are not installed
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  Reporter:  manulcaux  |      Owner:  (none)
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  base       |    Version:
Resolution:             |   Keywords:
      Port:             |
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Comment (by mf2k):

 You are reporting 2 different problems. Please give an example of a port
 that gives the command line tools warning. The problem with ds9 not
 compiling is likely not related because it build fine for me on Mojave.
 You should open another ticket for that and attach the main.log file.

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Ticket URL: <https://trac.macports.org/ticket/59837#comment:2>
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