[MacPorts] #42675: akonadi: build fails with Boost linking errors

[MacPorts]

#42675: akonadi: build fails with Boost linking errors
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  Reporter:  me@…     |      Owner:  nicos@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.2.1
Resolution:           |   Keywords:
      Port:  akonadi  |
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Comment (by nicos@…):

 For what I tested, the errors are coming from the fact you are using
 different compilers. You have requested the +gcc49 variant for boost,
 while the default compiler for akonadi is clang. When running
 {{{
 sudo port install akonadi configure.compiler=macports-gcc-4.9
 }}}
 it then compiles fine. It seems thus required to stay consistent with
 compilers, so that dependents may also have to be built with gcc49, or
 boost would have to be built with clang. Considering the issues with
 different underlying libraries (libc++ vs. libstdc++) employed by
 different compilers which has been identified when Mavericks came out, it
 is unlikely this issue could be solved easily.

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Ticket URL: <https://trac.macports.org/ticket/42675#comment:3>
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