[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:  (none)
      Type:  defect            |     Status:  new
  Priority:  Normal            |  Milestone:
 Component:  ports             |    Version:  2.6.4
Resolution:                    |   Keywords:
      Port:  openmpi mpich     |
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Comment (by michaellass):

 For OpenMPI, this seems to be fixed in version 4.1.0, released a week ago.
 At least they mention Big Sur in the changelog
 (https://raw.githubusercontent.com/open-mpi/ompi/v4.1.x/NEWS) and I was
 able to build the port after adjusting version and checksums in the
 Portfile.

 I think mascguy is working on the openmpi port currently. Do you want to
 update it to 4.1.0 as well or should I send a pull request?

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Ticket URL: <https://trac.macports.org/ticket/61492#comment:17>
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