[MacPorts] #69786: R-quanteda now fails on 10.12 and earlier with libc++: error: aligned deallocation function of type 'void (void *, std::align_val_t) noexcept' is only available on macOS 10.13 or newer

[MacPorts]

#69786: R-quanteda now fails on 10.12 and earlier with libc++: error: aligned
deallocation function of type 'void (void *, std::align_val_t) noexcept' is
only available on macOS 10.13 or newer
-------------------------+-------------------------------------------------
  Reporter:              |      Owner:  (none)
  barracuda156           |
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.9.3
Resolution:              |   Keywords:  sierra, elcapitan, yosemite,
                         |  mavericks, mountainlion, lion, snowleopard,
      Port:  R-quanteda  |  leopard, tiger
-------------------------+-------------------------------------------------

Comment (by aeiouaeiouaeiouaeiouaeiouaeiou):

 This can definitely be fixed by adding the {{{-fno-aligned-allocation}}}
 flag to CXX environment, but this trick doesn't work with the GCC compiler
 (mentioned in [https://github.com/macports/macports-
 ports/blob/ecaaceb301205f2e1e8008d15c6f44b4cb4ba4a7/science/madness/Portfile#L107
 madness portfile]).

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Ticket URL: <https://trac.macports.org/ticket/69786#comment:1>
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