[MacPorts] #53201: cmake: doesn't recognize macports-clang (No known features for CXX compiler)

[MacPorts]

#53201: cmake: doesn't recognize macports-clang (No known features for CXX
compiler)
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  Reporter:  RJVB    |      Owner:  michaelld
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  cmake   |
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Comment (by mojca):

 Both Jeremy and Larry are subscribed to this ticket. I don't think the
 patch should worry about equivalence table, but merely do the same thing
 as it's done on Linux for the stock Clang complier. Worrying about
 equivalence table should be left to CMake developers when supporting
 AppleClang. Our task is easier.

 Not that I understand this madness about trying to cover the database of
 all features of all compilers. Testing for features sounds way more
 useful. But we should primarily make sure that we don't bail out just
 because "macports-clang-x.y" is used.

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Ticket URL: <https://trac.macports.org/ticket/53201#comment:12>
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