[MacPorts] #57539: legacysupport-1.0: Let ports specify what symbols they need

[MacPorts]

#57539: legacysupport-1.0: Let ports specify what symbols they need
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  Reporter:  ryandesign     |      Owner:  (none)
      Type:  defect         |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:                 |   Keywords:
      Port:  legacysupport  |
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Comment (by cjones051073):

 The linker should already be dealing with this. It should only actually
 link the library if the target requires one of the symbols it requires.
 Otherwise the linkage should be dropped and not appear in the end
 binaries.

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Ticket URL: <https://trac.macports.org/ticket/57539#comment:4>
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