[MacPorts] #69999: libstemmer @2.2.0 does not respect sdk version

[MacPorts]

#69999: libstemmer @2.2.0 does not respect sdk version
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  Reporter:  lukaso      |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  libstemmer  |
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Comment (by jmroot):

 I don't think that is correct, because the way Apple would prefer apps to
 be developed is to use the latest SDK and set the deployment target to the
 oldest OS you want to be able to run on. That of course only works if you
 don't use any weak-linked symbols or check for them at runtime and have
 fallback code for when they're not available, and most OSS code doesn't
 have runtime checks, so you have to build against the older SDK to ensure
 the newer symbols are not found at configure time. But if I'm correct and
 the newer SDK is only being used at link time here, the choice of which
 symbols to use has already been made earlier, so there's no problem.

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Ticket URL: <https://trac.macports.org/ticket/69999#comment:4>
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