[MacPorts] #49795: libcxx @3.7.0 fails building on 10.6.8

[MacPorts]

#49795: libcxx @3.7.0 fails building on 10.6.8
-------------------------+--------------------------------
  Reporter:  braumann@…  |      Owner:  macports-tickets@…
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.3.4
Resolution:              |   Keywords:
      Port:  libcxx      |
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Comment (by gnwiii@…):

 On OS X Mavericks, {{{/usr/include/cxxabi.h}}} does not have the
 {{{#include <__cxxabi_config.h>}}}.  On 10.6.8, the
 {{{/usr/include/cxxabi.h}}} that references {{{__cxxabi_config.h}}} seems
 to come from {{{libcxxabi}}}.  See [http://llvm.org/viewvc/llvm-
 project/libcxxabi/trunk/include/__cxxabi_config.h?revision=228363&view=markup]
 which says "(note: we will have to ship this header).". A workaround is to
 copy the file from {{{llvm.org}}} to {{{/usr/include}}}.

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Ticket URL: <https://trac.macports.org/ticket/49795#comment:1>
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