[MacPorts] #56013: source-highlight @3.1.8_3: crashes (and fails to build) on 10.6

[MacPorts]

#56013: source-highlight @3.1.8_3: crashes (and fails to build) on 10.6
-------------------------------+-----------------
  Reporter:  Ionic             |      Owner:
      Type:  defect            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:
Resolution:                    |   Keywords:
      Port:  source-highlight  |
-------------------------------+-----------------

Comment (by Ionic):

 Switching to a `libc++`-based installation as described in
 [[LibcxxOnOlderSystems]] fixes this bug, which is not very surprising.

 Given that boost seems to be linking against the system `libstdc++`, which
 doesn't support C++11, we could potentially fix this issue by having boost
 link against `macports-libstdc++`, which does support C++11, if the
 `libc++` is set to `libstdc++`. Comments?

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Ticket URL: <https://trac.macports.org/ticket/56013#comment:3>
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