[MacPorts] #51832: libgcc command execution failed on macOS 10.12 Sierra

[MacPorts]

#51832: libgcc command execution failed on macOS 10.12 Sierra
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  Reporter:  stefan.meingast@…  |      Owner:  mww@…
      Type:  defect             |     Status:  new
  Priority:  Normal             |  Milestone:
 Component:  ports              |    Version:  2.3.4
Resolution:                     |   Keywords:  sierra
      Port:  libgcc             |
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Comment (by stefan.meingast@…):

 Replying to [comment:5 ethansherriff@…]:
 > I managed to get this building on Sierra with Xcode 8 beta 2 and the
 above patch. Please bear in mind this is only a workaround and don't sue
 me if it breaks your system :P

 Thanks! I had to revert to 10.11 for the moment since my testing computer
 (MacBook Pro late 2009) does not support 10.12 anymore and I depend on
 Macports (and gcc) for work. It would be great if you could try to build
 it with the latest beta versions of 10.12 and Xcode.

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Ticket URL: <https://trac.macports.org/ticket/51832#comment:6>
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