[MacPorts] #61845: shibboleth port not building on at least Big Sur

[MacPorts]

#61845: shibboleth port not building on at least Big Sur
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  Reporter:  scantor     |      Owner:  scantor
      Type:  defect      |     Status:  assigned
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:              |   Keywords:
      Port:  shibboleth  |
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Comment (by scantor):

 I believe this is quite likely due to something causing the -undefined ld
 option to be left unset. My CLI build must be getting it set to
 dynamic_lookup. I suspect the problem is that Apple's libtool knows to do
 this and GNU libtool from macports does not. Perhaps there's a standard
 way to divert to Apple's?

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Ticket URL: <https://trac.macports.org/ticket/61845#comment:2>
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