[MacPorts] #44129: cmake: fix build against libc++ on Lion

[MacPorts]

#44129: cmake: fix build against libc++ on Lion
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  Reporter:  mojca@…  |      Owner:  michaelld@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:
Resolution:           |   Keywords:  lion
      Port:  cmake    |
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Comment (by michaelld@…):

 Do you have +replacemnt_libcxx activated? (Note lacking the last 'e':
 "mnt", not "ment")? And, which OS are you on? If you're on 10.7+, then
 libcxx just installs a README file; see "port contents libcxx".

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Ticket URL: <https://trac.macports.org/ticket/44129#comment:23>
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