[MacPorts] #58199: cmake: build failure on OSX 10.11 due to LegacySupport PortGroup

[MacPorts]

#58199: cmake: build failure on OSX 10.11 due to LegacySupport PortGroup
---------------------+-----------------------
  Reporter:  dbl001  |      Owner:  michaelld
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.5.4
Resolution:          |   Keywords:
      Port:  cmake   |
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Comment (by macuserguru):

 This works:
 {{{
 sudo port upgrade outdated and not cmake
 }}}

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Ticket URL: <https://trac.macports.org/ticket/58199#comment:23>
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