[MacPorts] #60470: clang-devel @20200505-6d6d48ad+analyzer+assertions+libstdcxx: fails to build

[MacPorts]

#60470: clang-devel @20200505-6d6d48ad+analyzer+assertions+libstdcxx: fails to
build
---------------------+-------------------------
 Reporter:  EdHarry  |      Owner:  (none)
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:  2.6.2
 Keywords:           |       Port:  clang-devel
---------------------+-------------------------
 Clang-devel fails to build on MacOS 10.13, getting "Undefined symbols for
 architecture x86_64" errors:

 {{{
 Undefined symbols for architecture x86_64:
   "__ZTIDu", referenced from:
      -exported_symbol[s_list] command line option
   "__ZTIPDu", referenced from:
      -exported_symbol[s_list] command line option
   "__ZTIPKDu", referenced from:
      -exported_symbol[s_list] command line option
   "__ZTSDu", referenced from:
      -exported_symbol[s_list] command line option
   "__ZTSPDu", referenced from:
      -exported_symbol[s_list] command line option
   "__ZTSPKDu", referenced from:
      -exported_symbol[s_list] command line option
 ld: symbol(s) not found for architecture x86_64
 }}}

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Ticket URL: <https://trac.macports.org/ticket/60470>
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