[MacPorts] #66261: mpich-default: can't build universal variant on arm64

[MacPorts]

#66261: mpich-default: can't build universal variant on arm64
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  Reporter:  catap          |      Owner:  eborisch
      Type:  defect         |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:                 |   Keywords:  universal
      Port:  mpich-default  |
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Comment (by jmroot):

 It's going to be very difficult to build anything universal for arm64 and
 x86_64 with gcc, because a single gcc installation won't build both of
 those archs. You would need a cross compiler for one of them.

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Ticket URL: <https://trac.macports.org/ticket/66261#comment:1>
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