[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  |
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Comment (by Ionic):

 Replying to [comment:4 kencu]:
 > We are about to default to `libc++` on all Intel systems, in part for
 exactly this reason.

 Yeah, that's why I decided to switch my 10.6 VM over to the new system.
 There are more and more problems with the default system `libstdc++` and
 if consensus is to only support these systems with `libc++`, I might as
 well switch.

 [[br]]

 > Perhaps this is a `wontfix`?

 Maybe. The question, though, is, whether adding `-stdlib=macports-
 libstdc++` to the boost build process if `cxx_stdlib eq libstdc++` could
 trivially fix this problem for the now legacy-legacy platform or not. I
 might want to test this out in my `libstdc++` backup prefix.

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Ticket URL: <https://trac.macports.org/ticket/56013#comment:5>
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