[MacPorts] #51245: libgcc-devel @6-20160421_0 build fails on OS X 10.10.5

[MacPorts]

#51245: libgcc-devel @6-20160421_0 build fails on OS X 10.10.5
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  Reporter:  mopihopi@…            |      Owner:  mww@…
      Type:  defect                |     Status:  new
  Priority:  Normal                |  Milestone:
 Component:  ports                 |    Version:  2.3.4
Resolution:                        |   Keywords:
      Port:  libgcc, libgcc-devel  |
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Comment (by dstrubbe@…):

 Yes, and this is a much bigger deal now that it is the default dependency
 for all the gcc versions. Some possible insight might come from:
 https://github.com/Homebrew/legacy-homebrew/issues/38501 and ticket
 #45174.

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Ticket URL: <https://trac.macports.org/ticket/51245#comment:8>
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