[MacPorts] #57651: rsgislib needs cxx11 1.1 portgroup

[MacPorts]

#57651: rsgislib needs cxx11 1.1 portgroup
------------------------+----------------------
 Reporter:  ryandesign  |      Owner:  Veence
     Type:  defect      |     Status:  assigned
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:              |       Port:  rsgislib
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 https://build.macports.org/builders/ports-10.8_x86_64_legacy-
 builder/builds/79653/steps/install-port/logs/stdio

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Ticket URL: <https://trac.macports.org/ticket/57651>
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