[MacPorts] #50456: gflags @2.1.2 issues while running (against facebook folly)

[MacPorts]

#50456: gflags @2.1.2 issues while running (against facebook folly)
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  Reporter:  georgemp@…  |      Owner:  c9s@…
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.4
Resolution:              |   Keywords:
      Port:  gflags      |
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Comment (by khindenburg@…):

 The README.md for 2.1.2 says they changed a lot of API issues which is
 likely the issue here.  For now, just use 2.0 as you are until this can be
 fixed.

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Ticket URL: <https://trac.macports.org/ticket/50456#comment:5>
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