[MacPorts] #56637: cmake and gobject_introspection portgroups together cause invalid CC archflags

[MacPorts]

#56637: cmake and gobject_introspection portgroups together cause invalid CC
archflags
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  Reporter:  drkp    |      Owner:  jmroot
      Type:  defect  |     Status:  closed
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:  fixed   |   Keywords:
      Port:          |
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Comment (by jmroot):

 If you append a list to a list as a single element then it gets extra
 quoting. So yes, the cmake portgroup did introduce the braces.

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Ticket URL: <https://trac.macports.org/ticket/56637#comment:7>
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