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

[MacPorts]

#44129: cmake: fix build against libc++ on Lion
---------------------+-------------------
 Reporter:  mojca@…  |      Owner:  css@…
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:  lion     |       Port:  cmake
---------------------+-------------------
 Building CMake against `libc++` seems to be broken on Lion. The reason is
 that the bootstrap cmake sometimes cuts the lines at 1024 characters.

 See:
   * http://public.kitware.com/pipermail/cmake-
 developers/2014-June/010712.html

 The dirty workaround is to run a few commands manually, but it would be
 nice to find a proper patch.

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