[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
 Keywords:              |       Port:  libcxx
------------------------+--------------------------------
 While upgrading {{{libcxx}}} from {{{3.6.0_0}}} to {{{3.7.0_0}}} I get the
 following trouble:

 {{{
 :info:build + /opt/local/bin/clang++-mp-3.4 -c -g -Os -arch x86_64
 -nostdinc++ -std=c++11 -U__STRICT_ANSI__ -I../include ../src/exception.cpp
 :info:build In file included from ../src/exception.cpp:20:
 :info:build /usr/include/cxxabi.h:21:10: fatal error: '__cxxabi_config.h'
 file not found
 :info:build #include <__cxxabi_config.h>
 :info:build          ^
 :info:build 1 error generated.
 :info:build Command failed:  cd
 "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_ports_lang_libcxx/libcxx/work/libcxx-3.7.0.src/lib"
 && ./buildit all
 :info:build Exit code: 1
 }}}

 A brief search inside {{{/opt/local/var/macports/build}}} confirmed that
 indeed {{{__cxxabi_config.h}}} is missing. The question remains where this
 file is being found on more modern platforms.

-- 
Ticket URL: <https://trac.macports.org/ticket/49795>
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