From 3ad39e9878310e5317ee73c9b353c1e2c1c5c4ee Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.x@gmail.com>
Date: Sat, 11 Jul 2026 22:48:30 +0800
Subject: lib: establish Zircon libc++ and KTL foundation

---
 third_party/libcxx/include/c++/v1/iostream | 72 ++++++++++++++++++++++++++++++
 1 file changed, 72 insertions(+)
 create mode 100644 third_party/libcxx/include/c++/v1/iostream

(limited to 'third_party/libcxx/include/c++/v1/iostream')

diff --git a/third_party/libcxx/include/c++/v1/iostream b/third_party/libcxx/include/c++/v1/iostream
new file mode 100644
index 0000000..0e83f00
--- /dev/null
+++ b/third_party/libcxx/include/c++/v1/iostream
@@ -0,0 +1,72 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP_IOSTREAM
+#define _LIBCPP_IOSTREAM
+
+/*
+    iostream synopsis
+
+#include <ios>
+#include <istream>
+#include <ostream>
+#include <streambuf>
+
+namespace std {
+
+extern istream cin;
+extern ostream cout;
+extern ostream cerr;
+extern ostream clog;
+extern wistream wcin;
+extern wostream wcout;
+extern wostream wcerr;
+extern wostream wclog;
+
+}  // std
+
+*/
+
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/iostream>
+#else
+#  include <__config>
+#  include <version>
+
+// standard-mandated includes
+
+// [iostream.syn]
+#  include <ios>
+#  include <istream>
+#  include <ostream>
+#  include <streambuf>
+
+#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#    pragma GCC system_header
+#  endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+extern _LIBCPP_EXPORTED_FROM_ABI istream cin;
+extern _LIBCPP_EXPORTED_FROM_ABI ostream cout;
+extern _LIBCPP_EXPORTED_FROM_ABI ostream cerr;
+extern _LIBCPP_EXPORTED_FROM_ABI ostream clog;
+
+#  if _LIBCPP_HAS_WIDE_CHARACTERS
+extern _LIBCPP_EXPORTED_FROM_ABI wistream wcin;
+extern _LIBCPP_EXPORTED_FROM_ABI wostream wcout;
+extern _LIBCPP_EXPORTED_FROM_ABI wostream wcerr;
+extern _LIBCPP_EXPORTED_FROM_ABI wostream wclog;
+#  endif
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+
+#endif // _LIBCPP_IOSTREAM
-- 
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