[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
----------------------------+----------------------
  Reporter:  MartySkinner   |      Owner:  RJVB
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:  2.4.2
Resolution:                 |   Keywords:
      Port:  smartmontools  |
----------------------------+----------------------

Comment (by ryandesign):

 Replying to [comment:2 RJVB]:
 > {{{
 > if {${os.major} < 13} {
 > }}}

 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.

 > {{{
 >         --without-cxx11-option=no
 > }}}

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

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Ticket URL: <https://trac.macports.org/ticket/55730#comment:3>
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