[MacPorts] #48145: castxml: add variants for different versions of clang toolchain, use corresponding toolchain for compilation

[MacPorts]

#48145: castxml: add variants for different versions of clang toolchain, use
corresponding toolchain for compilation
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  Reporter:  mmoll@…  |      Owner:  stromnov@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.3.3
Resolution:           |   Keywords:  haspatch
      Port:  castxml  |
----------------------+------------------------

Comment (by mmoll@…):

 You mean the same compiler as was used to compile LLVM/Clang? CastXML
 requires a C++11 compiler. It is probably a good idea to "inherit" the
 compiler blacklist from clang 3.6/3.7 to avoid build problems like these:
 https://build.macports.org/builders/buildports-mtln-x86_64/builds/24158.

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Ticket URL: <https://trac.macports.org/ticket/48145#comment:2>
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