[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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Changes (by larryv@…):

 * status:  new => assigned
 * owner:  macports-tickets@… => larryv@…


Comment:

 I’ve been thinking about this. I’m leaning towards a syntax similar to
 that in `compiler_blacklist_versions`.
 {{{
 platforms   macosx {darwin >= 9} freebsd
 }}}

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Ticket URL: <https://trac.macports.org/ticket/38508#comment:1>
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