[MacPorts] #38508: RFE: add version number support to `platforms` field in portfiles

[MacPorts]

#38508: RFE: add version number support to `platforms` field in portfiles
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  Reporter:  egall@…      |      Owner:  larryv@…
      Type:  enhancement  |     Status:  closed
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:  2.1.3
Resolution:  duplicate    |   Keywords:
      Port:               |
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Comment (by larryv@…):

 Replying to [comment:4 raimue@…]:
 > The platform field is currently purely informational and is not
 enforced.

 Would changing this cause any problems?

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Ticket URL: <https://trac.macports.org/ticket/38508#comment:5>
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