[MacPorts] #54900: libgcc @7.2.0: fatal error: bits/regex_scanner.tcc: No such file or directory

[MacPorts]

#54900: libgcc @7.2.0: fatal error: bits/regex_scanner.tcc: No such file or
directory
---------------------------+------------------------
  Reporter:  cjones051073  |      Owner:
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.4.1
Resolution:                |   Keywords:  highsierra
      Port:  libgcc        |
---------------------------+------------------------

Comment (by kencu):

 there are some other gcc-like ports as well in MacPorts that will likely
 be affected too. `upc` for one...

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Ticket URL: <https://trac.macports.org/ticket/54900#comment:13>
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