[MacPorts] #55730: smartmontools @6.6.0 needs new variant(s) for older systems

[MacPorts]

#55730: smartmontools @6.6.0 needs new variant(s) for older systems
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  Reporter:  MartySkinner   |      Owner:  RJVB
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.4.2
Resolution:                 |   Keywords:
      Port:  smartmontools  |
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Comment (by RJVB):

 Replying to [comment:3 ryandesign]:

 > The decision should not be based on `${os.major}` but rather on
 `${configure.cxx_stdlib}`. If it's `libstdc++` then it does not support
 C++11, otherwise it does.

 I seem to recall that configure.cxx_stdlib wasn't always set to something
 other than an empty string, which would make using it for testing a bit
 complicated. Is that no longer the case?

 As long as the use of C++11 is purely optional I do not want to impose
 anything for using it or not.

 > Unless this configure script is weird, you would use either `--without-
 cxx11-option` or `--with-cxx11-option=no`.

 Please run `configure --help` and see for yourself?

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Ticket URL: <https://trac.macports.org/ticket/55730#comment:4>
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