[MacPorts] #65107: py310-pyqt5-webengine: xcrun: error: SDK "macosx10.13" cannot be located

[MacPorts]

#65107: py310-pyqt5-webengine: xcrun: error: SDK "macosx10.13" cannot be located
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  Reporter:  RivetBenoit                |      Owner:  reneeotten
      Type:  defect                     |     Status:  reopened
  Priority:  Normal                     |  Milestone:
 Component:  ports                      |    Version:  2.7.2
Resolution:                             |   Keywords:  highsierra
      Port:  py-pyqt5-webengine py-sip  |
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Comment (by mouse07410):

 > So you build against MacOSX.sdk, which is MacOSX13.0.sdk . . . But --
 those functions are not actually in your system, which is MacOSX12.3.
 Ultimately, your build either fails to link, or if it links, it fails to
 run. You're DOA.

 I understand your explanation. All I can say in response is that in all
 the years of building on Mac software (that worked! ;) - and most of it
 with Xcode Clang - I never encountered such a situation myself. And in
 99.99% of cases, software performed no specific tests (beyond what, e.g.,
 {{{autoconf}}} does).

 One thing though:

 > Your configure scripts test for things using the headers in that SDK,
 and this finds certain features in the headers as defined, certain
 functions are available, etc.

 AFAIK, {{{autoconf}}} and such determine what functions to test for using
 available headers - but then try to **actually compile and link test-
 binary** to ensure the function is really there. Relying merely on what's
 in the header doesn't sound like a good idea.

-- 
Ticket URL: <https://trac.macports.org/ticket/65107#comment:13>
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