[MacPorts] #39428: mpich should have variant +gcc47 by default

[MacPorts]

#39428: mpich should have variant +gcc47 by default
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  Reporter:  dstrubbe@…   |      Owner:  eborisch@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.1.3
Resolution:               |   Keywords:  haspatch
      Port:  mpich        |
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Comment (by dstrubbe@…):

 Thanks for the comment. I saw that openmpi used gcc47 as a default, so I
 thought by analogy it should be the same for mpich. Maybe you disagree
 with the choice made there. active_variants doesn't really solve the
 problem: if you do "install arpack +mpich" and do not already have mpich
 installed, then mpich will be installed, and without Fortran by default.
 Then active_variants in the arpack Portfile will tell you that though
 openmpi was installed as a dependency, it is not acceptable since it
 doesn't have a Fortran wrapper. That is the issue I am trying to solve,
 which would happen for any port that wants mpif77 or mpif90.

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Ticket URL: <https://trac.macports.org/ticket/39428#comment:3>
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