[MacPorts] #49567: akonadi: build fails

[MacPorts]

#49567: akonadi: build fails
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  Reporter:  steve.kaeppler@…  |      Owner:  nicos@…
      Type:  defect            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:  2.3.4
Resolution:                    |   Keywords:
      Port:  akonadi           |
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Comment (by ryandesign@…):

 Thanks. I see the problem is related to undefined symbols in boost. I see
 that you are on OS X 10.8 Mountain Lion, which uses libstdc++ by default.
 I see that akonadi seems to require C++11, which libstdc++ does not
 support. I see that the akonadi port tries to do some fooling around with
 the compiler blacklist/whitelist to use gcc5 to try to support C++11. I
 don't see how this could possibly work since it would require all
 dependencies (including boost) to use that same compiler, which boost does
 not. I am attaching a patch that I propose as the fix. Nicolas, what do
 you think?

 I have not yet tried to reproduce the problem on Mountain Lion, but I will
 try to do so now.

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Ticket URL: <https://trac.macports.org/ticket/49567#comment:7>
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