[MacPorts] #55382: cmake @3.10.0: Cannot find a C++ compiler supporting C++11 on this system

[MacPorts]

#55382: cmake @3.10.0: Cannot find a C++ compiler supporting C++11 on this system
-------------------------+-------------------------------------------------
  Reporter:  ryandesign  |      Owner:  michaelld
      Type:  defect      |     Status:  new
  Priority:  High        |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:  tiger leopard snowleopard lion
      Port:  cmake       |  mountainlion
-------------------------+-------------------------------------------------

Comment (by kencu):

 Something like that might work. But there are hiccups -- 10.7 configured
 to libc++ can't build the current cmake, for example, and has to be forced
 back to libstdc++ for the build to work. Weird stuff.

 Also, if we did spin off cmake39 for older systems, Michael might be able
 to clean out a lot of legacy crud in that cmake Portfile and start lean
 fresh going forward...

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Ticket URL: <https://trac.macports.org/ticket/55382#comment:14>
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