[MacPorts] #58441: "port upgrade libgcc8" pulls libgcc9 instead (and fails, of course). Also affects gcc8 port

[MacPorts]

#58441: "port upgrade libgcc8" pulls libgcc9 instead (and fails, of course). Also
affects gcc8 port
-------------------------+--------------------
  Reporter:  mouse07410  |      Owner:  (none)
      Type:  defect      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:  worksforme  |   Keywords:
      Port:  libgcc8     |
-------------------------+--------------------

Comment (by kencu):

 on your system, clang-3.4 is failing a "sanity check" during the libgcc9
 build.

 The detail of what exactly failed is in a file called config.log in your
 libgcc9 build directory. Post that if you can spot it.

 I'll see if I can reproduce this on my 10.7 machine..

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Ticket URL: <https://trac.macports.org/ticket/58441#comment:15>
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