[MacPorts] #63110: clang-12 build error due to cmake portgroup setting an extremely old C and CXX standard because the llvm portfiles don't use base's compiler.c_standard or compiler.cxx_standard

[MacPorts]

#63110: clang-12 build error due to cmake portgroup setting an extremely old C and
CXX standard because the llvm portfiles don't use base's
compiler.c_standard or compiler.cxx_standard
----------------------+--------------------
  Reporter:  blair    |      Owner:  kencu
      Type:  defect   |     Status:  closed
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:  fixed    |   Keywords:
      Port:  llvm-12  |
----------------------+--------------------

Comment (by jmroot):

 Replying to [comment:4 kencu]:
 > they do now, for cmake builds using the cmake 1.1 PG, at least.

 Yes, I'm saying that that change to the cmake portgroup significantly
 changes the semantics of those options when using that portgroup.

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Ticket URL: <https://trac.macports.org/ticket/63110#comment:7>
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