[MacPorts] #53044: octave @4.2.0_1: requires C++11, does not build correctly on default setups on < 10.9

[MacPorts]

#53044: octave @4.2.0_1: requires C++11, does not build correctly on default setups
on < 10.9
---------------------+---------------------------------
  Reporter:  mojca   |      Owner:  MarcusCalhoun-Lopez
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:  snowleopard lion
      Port:  octave  |
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Comment (by MarcusCalhoun-Lopez):

 Replying to [comment:16 mojca]:
 > I don't understand how this was supposed to fix the problem. (And the
 builds on the buildbot still fail.)
 As I understand the situation, not only is `libc++` incompatible with with
 `libstdc++`, but `libstdc++` is incompatible with older versions.[[BR]]
 According to
 [https://gcc.gnu.org/onlinedocs/gcc-5.2.0/libstdc++/manual/manual/using_dual_abi.html
 this], `-D_GLIBCXX_USE_CXX11_ABI=0` allows the current `libstdc++` to be
 compatible with the (older) system `libstdc++`.

 From what I can tell, octave now builds
 [http://packages.macports.org/octave/?C=N;O=A back to Mac OS 10.7].[[BR]]
 Can this ticket be closed?

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Ticket URL: <https://trac.macports.org/ticket/53044#comment:19>
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