[MacPorts] #64551: freeciv @2.6.6: X11 config tests gives -Wimplicit-function-declaration warning on exit, strcmp

[MacPorts]

#64551: freeciv @2.6.6: X11 config tests gives -Wimplicit-function-declaration
warning on exit, strcmp
----------------------+----------------------
  Reporter:  JDLH     |      Owner:  JDLH
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.7.1
Resolution:           |   Keywords:
      Port:  freeciv  |
----------------------+----------------------

Comment (by JDLH):

 Filed [http://freeciv.org/ Freeciv] ticket
 [https://osdn.net/projects/freeciv/ticket/43737 #43737 Configure scripts
 give needless -Wimplicit-function-declaration errors on macOS] to track
 this issue with the upstream project.

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Ticket URL: <https://trac.macports.org/ticket/64551#comment:2>
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