[MacPorts] #71052: llvm-19 @19.1.1: possibly rpath-related problems on macOS Sequoia

[MacPorts]

#71052: llvm-19 @19.1.1: possibly rpath-related problems on macOS Sequoia
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  Reporter:  tglsfdc  |      Owner:  (none)
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.10.2
Resolution:           |   Keywords:
      Port:  llvm-19  |
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Comment (by ryandesign):

 We've discussed elsewhere (I can't find it right now) that using a
 MacPorts llvm will pull in its copy of libc++ instead of the system's (due
 to the `-L` flag you mentioned) and that this is undesirable. Your
 experience with its copy of libunwind is probably the same. libc++ and
 libunwind are both system libraries and in most cases we probably want to
 use those, not other versions of them installed by MacPorts. MacPorts also
 has a libunwind port and just having it installed causes lots of other
 software to fail to build because it supersedes the system copy of
 libunwind; see #66250.

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Ticket URL: <https://trac.macports.org/ticket/71052#comment:2>
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