[MacPorts] #56405: eccodes ENABLE_MEMFS variant

[MacPorts]

#56405: eccodes ENABLE_MEMFS variant
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  Reporter:  isezen       |      Owner:  tenomoto
      Type:  enhancement  |     Status:  closed
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:  fixed        |   Keywords:
      Port:  ecCodes      |
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Comment (by tenomoto):

 The default value of `ENABLE_MEMFS` is currently `OFF` so I made it a
 variant.

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Ticket URL: <https://trac.macports.org/ticket/56405#comment:5>
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