[MacPorts] #62775: gcc10 @10.3.0: gcc10 failed to build from source on Big Sur 11.3

[MacPorts]

#62775: gcc10 @10.3.0: gcc10 failed to build from source on Big Sur 11.3
---------------------+--------------------
  Reporter:  ferdy   |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:  2.6.4
Resolution:          |   Keywords:
      Port:  gcc10   |
---------------------+--------------------

Comment (by kencu):

 This is a known issue upstream, and has to do with the way clang now
 generates objects differently between debug and non-debug cases, leading
 to a bootstrap compare failure.

 "The workaround will be to configure GCC without debug-compare in
 bootstrap."

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Ticket URL: <https://trac.macports.org/ticket/62775#comment:3>
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