-stdlib=libc++ fails for some ports

[Volodymyr Kostyrko]

Hi all.

When compiling databases/db5 with CFLAGS+= -stdlib=libc++ I got this:

libtool: compile:  c++ -c -I. -I./../src -D_THREAD_SAFE -O2 -pipe 
-march=native -fno-strict-aliasing -stdlib=libc++ ../lang/cxx/cxx_db.cpp 
  -fPIC -DPIC -o .libs/cxx_db.o
In file included from ../lang/cxx/cxx_channel.cpp:13:
In file included from ./db_cxx.h:55:
In file included from /usr/include/c++/v1/iostream:38:
In file included from /usr/include/c++/v1/ios:216:
In file included from /usr/include/c++/v1/__locale:15:
In file included from /usr/include/c++/v1/string:434:
In file included from /usr/include/c++/v1/algorithm:590:
In file included from /usr/include/c++/v1/initializer_list:47:
/usr/include/c++/v1/cstddef:64:61: error: expected class member or base 
class name
     _LIBCPP_ALWAYS_INLINE _LIBCPP_CONSTEXPR nullptr_t() : _(0) {}
                                                             ^
./db_int.h:445:16: note: expanded from macro '_'
#define _(msg)  msg     /* Replace with localization function. */
                 ^

The problem is actually on libc++ side and has been fixed upstream:

http://llvm.org/viewvc/llvm-project?view=rev&revision=167038

-- 
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