[MacPorts] #54327: Error: Failed to build libgcc: command execution failed

[MacPorts]

#54327: Error: Failed to build libgcc: command execution failed
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  Reporter:  pedrotildes  |      Owner:
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.4.1
Resolution:               |   Keywords:
      Port:  libgcc       |
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Comment (by ryandesign):

 Replying to [comment:16 kencu]:
 > Oh - now that I look closer, you have stuff in there from a previous
 version of macOS (platform darwin 15). That's a serious no-no.

 Well the one shown wasn't active so it isn't doing anything harmful.

 The user should of course follow wiki:Migration when upgrading the OS.

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Ticket URL: <https://trac.macports.org/ticket/54327#comment:18>
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