[MacPorts] #72023: swi-prolog @9.2.9: Patch idea for macOS 10.11.6

[MacPorts]

#72023: swi-prolog @9.2.9: Patch idea for macOS 10.11.6
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  Reporter:  kogule       |      Owner:  JanWielemaker
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.10.5
Resolution:               |   Keywords:
      Port:  swi-prolog   |
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Comment (by JanWielemaker):

 Thanks.  Well, looking through the error, it seems the compiler was happy.
 That should be correct and clang-16 surely supports C++-17.   So, the
 _header_ files __do__ have `std::shared_lock`.  For the standard -lc and
 -lc++ libraries the compiler should find the matching library.  Apparently
 it does not.   That makes me conclude the your clang-16-mp compiler is
 misconfigured.

 Possibly you can hack around that using environment variables.   It is not
 an issue of SWI-Prolog though.   The only sort of "patch" I'm willing to
 accept for this is a CMake test that figures out that the C++ compiler is
 broken and removes the C++ interface from the system as a consequence.
 That is probably a try-compile test with a minimal program that makes this
 fail.

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Ticket URL: <https://trac.macports.org/ticket/72023#comment:5>
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