[MacPorts] #61642: ds9 @8.1.1 +x11: build failure on Catalina

[MacPorts]

#61642: ds9 @8.1.1 +x11: build failure on Catalina
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  Reporter:  DaveStrickland  |      Owner:  lpsinger
      Type:  defect          |     Status:  assigned
  Priority:  Normal          |  Milestone:
 Component:  ports           |    Version:  2.6.4
Resolution:                  |   Keywords:
      Port:  ds9             |
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Comment (by chrstphrchvz):

 Replying to [comment:5 DaveStrickland]:
 > I'm still having exactly the same problem using Macports 2.7.1 on
 Catalina, so I'm surprised to see Port Health claiming that this port
 builds on Catalina.

 The port health reflects a successful build on 10.15 likely because the
 10.15 builder uses Xcode 11.7, which unlike Xcode 12 and later does not
 consider implicit function declarations to be errors.

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Ticket URL: <https://trac.macports.org/ticket/61642#comment:6>
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