[MacPorts] #37785: Ports depending on mpich2: move to mpich

[MacPorts]

#37785: Ports depending on mpich2: move to mpich
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  Reporter:  eborisch@…  |      Owner:  eborisch
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.1.2
Resolution:              |   Keywords:  haspatch
      Port:  mpich2      |
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Comment (by eborisch@…):

 I debated that myself and figured I'd leave it to each maintainer to
 decide...

 I think it would make sense to change it, perhaps leaving the +mpich2
 variant but have it raise a ui_error that the variant has been renamed (so
 those that had {{{fftw3 +mpich2}}} installed don't end up with {{{fftw3}}}
 (no variants) after upgrade.)

 Or is there a replaced_by equivalent for variants?

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Ticket URL: <https://trac.macports.org/ticket/37785#comment:2>
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