[MacPorts] #60449: gcc10 missing header <wchar.h>

[MacPorts]

#60449: gcc10 missing header <wchar.h>
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  Reporter:  haberg-1  |      Owner:  (none)
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.6.2
Resolution:            |   Keywords:  catalina
      Port:  gcc10     |
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Comment (by cjones051073):

 Note, the logs I attached above or *without* setting {SDKROOT}, or using
 {xcrum}. Its what I get out the book just using

 {{{
 g++-mp-10 -H test.cpp
 }}}

 etc.

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Ticket URL: <https://trac.macports.org/ticket/60449#comment:7>
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