[MacPorts] #43869: libgcc @4.8.2_1: error: '_Unwind_Ptr' does not name a type

[MacPorts]

#43869: libgcc @4.8.2_1: error: '_Unwind_Ptr' does not name a type
---------------------------+--------------------
  Reporter:  ryandesign@…  |      Owner:  mww@…
      Type:  defect        |     Status:  closed
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.3.0
Resolution:  fixed         |   Keywords:
      Port:  libgcc        |
---------------------------+--------------------

Comment (by jeremyhu@…):

 So it looks like from the command line, we're expecting to find unwind.h
 because of the:

 -B/opt/local/var/macports/build/_Users_rschmidt_macports_dports_lang_gcc5
 /libgcc-devel/work/build/./gcc

 but CPATH=/opt/local/include is taking precedence over that in Ryan's case
 but not in mine or Larry's.

 I'm having trouble figuring out a reduced case.

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Ticket URL: <https://trac.macports.org/ticket/43869#comment:24>
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