[MacPorts] #57415: hdf5 should not offer gcc variants that won't work

[MacPorts]

#57415: hdf5 should not offer gcc variants that won't work
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  Reporter:  SebKeen  |      Owner:  mamoll
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.5.4
Resolution:           |   Keywords:
      Port:  hdf5     |
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Comment (by ryandesign):

 Should it really be the responsibility of every port that offers gcc
 variants to know which gcc versions are supported on which systems? The
 gcc ports already know this information, and thus the correct information
 was already displayed to the user.

 The hdf5 port doesn't define these variants itself; it looks like it uses
 the mpi portgroup to do so. The compilers portgroup also exists which does
 something similar. If we really want these compiler variants not to be
 declared on systems where they won't work, that logic should be in the
 portgroups, not in the individual portfiles.

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Ticket URL: <https://trac.macports.org/ticket/57415#comment:2>
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