[MacPorts] #67355: Compiling hdf5 with +gcc12

[MacPorts]

#67355: Compiling hdf5 with +gcc12
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  Reporter:  jvianalopes  |      Owner:  eborisch
      Type:  defect       |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  hdf5         |
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Comment (by ryandesign):

 MacPorts base sets the `-stdlib` flag based on the value of the
 `configure.cxx_stdlib` option. By default MacPorts sets this to libc++
 when using clang++ and to libstdc++ when using g++. Very recently g++
 gained the ability to use libc++, I think, but historically that was not
 possible, and I don't know if anything has been added to MacPorts relating
 to that yet. Similarly, clang++ cannot use libstdc++, as far as I know.

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Ticket URL: <https://trac.macports.org/ticket/67355#comment:5>
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