[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:  assigned
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:  2.1.3
Resolution:               |   Keywords:
      Port:               |
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Comment (by egall@…):

 Replying to [comment:1 larryv@…]:
 > I’ve been thinking about this. I’m leaning towards a syntax similar to
 that in `compiler_blacklist_versions`.
 > {{{
 > platforms   macosx {darwin >= 9} freebsd
 > }}}

 That would be perfect, thanks for agreeing to take this on.

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Ticket URL: <https://trac.macports.org/ticket/38508#comment:2>
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