[MacPorts] #53625: qscintilla: requires C++11, not using the right compiler

[MacPorts]

#53625: qscintilla: requires C++11, not using the right compiler
-------------------------+-----------------------
  Reporter:  mojca       |      Owner:  michaelld
      Type:  defect      |     Status:  reopened
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  qscintilla  |
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Comment (by mojca):

 One important note. `clang-x.y` needs a special patch to support `-stdlib
 =macport-libstdc++` which has only been enabled by default on `clang-4.0`.
 {{{
 > port info clang-3.9

 clang-3.9 @3.9.1_3 (lang)
 Variants:             [+]analyzer, assertions, debug, libstdcxx, universal
 }}}

 If you want to test all this with clang 3.9, you need to make sure that
 you install it with the `+libstdcxx` variant (and thus have to recompile
 it since the version compiled by the buildbot doesn't have that option
 enabled). If you then want to use clang 3.9 with the cxx11-1.1 PortGroup,
 you need to add `macports-clang-3.9` to `compiler.whitelist`.

 But I find it strange that clang 4.0 misbehaves. It works just fine for
 me.

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Ticket URL: <https://trac.macports.org/ticket/53625#comment:17>
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