[MacPorts] #45472: Add SEA package to PARI as variant

[MacPorts]

#45472: Add SEA package to PARI as variant
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  Reporter:  watsonbladd@…  |      Owner:  ryandesign@…
      Type:  enhancement    |     Status:  assigned
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:                 |   Keywords:
      Port:  pari           |
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Comment (by ryandesign@…):

 The instructions on the packages page mention that the files can be
 installed into an existing pari installation just by copying the files to
 a particular place. That would be vastly preferable; we should do that, as
 subports, instead of as variants. Or since they actually have their own
 separate versions and distfiles, having each package as its own completely
 separate portfile would be easiest.

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Ticket URL: <https://trac.macports.org/ticket/45472#comment:2>
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