[MacPorts] #61492: Cannot build openmpi-gcc10, mpich-gcc10, etc. on macOS 11.0.1 Big Sur, Xcode 12.2

[MacPorts]

#61492: Cannot build openmpi-gcc10, mpich-gcc10, etc. on macOS 11.0.1 Big Sur,
Xcode 12.2
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  Reporter:  ChristopherMayes  |      Owner:  eborisch
      Type:  defect            |     Status:  assigned
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:  2.6.4
Resolution:                    |   Keywords:
      Port:  openmpi mpich     |
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Changes (by mf2k):

 * cc: eborisch (removed)
 * status:  new => assigned
 * owner:  (none) => eborisch


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Ticket URL: <https://trac.macports.org/ticket/61492#comment:26>
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