[MacPorts] #54829: libgcc6 @6.4.0: fatal error: bits/locale_facets.h: No such file or directory

[MacPorts]

#54829: libgcc6 @6.4.0: fatal error: bits/locale_facets.h: No such file or
directory
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  Reporter:  braslau  |      Owner:
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.4.1
Resolution:           |   Keywords:  highsierra
      Port:  libgcc6  |
----------------------+------------------------

Comment (by cjones051073):

 See https://trac.macports.org/ticket/54900 for a different fix.... Only
 seems to work on gcc7 though.

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Ticket URL: <https://trac.macports.org/ticket/54829#comment:10>
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