Add libc++ and libc++abi to third-party.

third_party/libc++/src/iostream.cpp

+//===------------------------ iostream.cpp --------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "__std_stream"
+#include "string"
+#include "new"
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+static mbstate_t state_types[6] = {};
+
+_ALIGNAS_TYPE (__stdinbuf<char> ) static char __cin [sizeof(__stdinbuf <char>)];
+_ALIGNAS_TYPE (__stdoutbuf<char>) static char __cout[sizeof(__stdoutbuf<char>)];
+_ALIGNAS_TYPE (__stdoutbuf<char>) static char __cerr[sizeof(__stdoutbuf<char>)];
+_ALIGNAS_TYPE (__stdinbuf<wchar_t> ) static char __wcin [sizeof(__stdinbuf <wchar_t>)];
+_ALIGNAS_TYPE (__stdoutbuf<wchar_t>) static char __wcout[sizeof(__stdoutbuf<wchar_t>)];
+_ALIGNAS_TYPE (__stdoutbuf<wchar_t>) static char __wcerr[sizeof(__stdoutbuf<wchar_t>)];
+
+_ALIGNAS_TYPE (istream)  _LIBCPP_FUNC_VIS char cin [sizeof(istream)];
+_ALIGNAS_TYPE (ostream)  _LIBCPP_FUNC_VIS char cout[sizeof(ostream)];
+_ALIGNAS_TYPE (ostream)  _LIBCPP_FUNC_VIS char cerr[sizeof(ostream)];
+_ALIGNAS_TYPE (ostream)  _LIBCPP_FUNC_VIS char clog[sizeof(ostream)];
+_ALIGNAS_TYPE (wistream) _LIBCPP_FUNC_VIS char wcin [sizeof(wistream)];
+_ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wcout[sizeof(wostream)];
+_ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wcerr[sizeof(wostream)];
+_ALIGNAS_TYPE (wostream) _LIBCPP_FUNC_VIS char wclog[sizeof(wostream)];
+
+ios_base::Init __start_std_streams;
+
+ios_base::Init::Init()
+{
+    istream* cin_ptr  = ::new(cin)  istream(::new(__cin)  __stdinbuf <char>(stdin, state_types+0) );
+    ostream* cout_ptr = ::new(cout) ostream(::new(__cout) __stdoutbuf<char>(stdout, state_types+1));
+    ostream* cerr_ptr = ::new(cerr) ostream(::new(__cerr) __stdoutbuf<char>(stderr, state_types+2));
+                        ::new(clog) ostream(cerr_ptr->rdbuf());
+    cin_ptr->tie(cout_ptr);
+    _VSTD::unitbuf(*cerr_ptr);
+    cerr_ptr->tie(cout_ptr);
+
+    wistream* wcin_ptr  = ::new(wcin)  wistream(::new(__wcin)  __stdinbuf <wchar_t>(stdin, state_types+3) );
+    wostream* wcout_ptr = ::new(wcout) wostream(::new(__wcout) __stdoutbuf<wchar_t>(stdout, state_types+4));
+    wostream* wcerr_ptr = ::new(wcerr) wostream(::new(__wcerr) __stdoutbuf<wchar_t>(stderr, state_types+5));
+                          ::new(wclog) wostream(wcerr_ptr->rdbuf());
+    wcin_ptr->tie(wcout_ptr);
+    _VSTD::unitbuf(*wcerr_ptr);
+    wcerr_ptr->tie(wcout_ptr);
+}
+
+ios_base::Init::~Init()
+{
+    ostream* cout_ptr = reinterpret_cast<ostream*>(cout);
+    ostream* clog_ptr = reinterpret_cast<ostream*>(clog);
+    cout_ptr->flush();
+    clog_ptr->flush();
+
+    wostream* wcout_ptr = reinterpret_cast<wostream*>(wcout);
+    wostream* wclog_ptr = reinterpret_cast<wostream*>(wclog);
+    wcout_ptr->flush();
+    wclog_ptr->flush();
+}
+
+_LIBCPP_END_NAMESPACE_STD