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/cstdarg | 59 +++++++++++++++++++++++++++++++
 1 file changed, 59 insertions(+)
 create mode 100644 third_party/libcxx/include/c++/v1/cstdarg

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

diff --git a/third_party/libcxx/include/c++/v1/cstdarg b/third_party/libcxx/include/c++/v1/cstdarg
new file mode 100644
index 0000000..069fe10
--- /dev/null
+++ b/third_party/libcxx/include/c++/v1/cstdarg
@@ -0,0 +1,59 @@
+// -*- 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_CSTDARG
+#define _LIBCPP_CSTDARG
+
+/*
+    cstdarg synopsis
+
+Macros:
+
+    type va_arg(va_list ap, type);
+    void va_copy(va_list dest, va_list src);  // C99
+    void va_end(va_list ap);
+    void va_start(va_list ap, parmN);
+
+namespace std
+{
+
+Types:
+
+    va_list
+
+}  // std
+
+*/
+
+#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+#  include <__cxx03/cstdarg>
+#else
+#  include <__config>
+
+// <stdarg.h> is not provided by libc++
+#  if __has_include(<stdarg.h>)
+#    include <stdarg.h>
+#    ifdef _LIBCPP_STDARG_H
+#      error "If libc++ starts defining <stdarg.h>, the __has_include check should move to libc++'s <stdarg.h>"
+#    endif
+#  endif
+
+#  if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#    pragma GCC system_header
+#  endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+using ::va_list _LIBCPP_USING_IF_EXISTS;
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
+
+#endif // _LIBCPP_CSTDARG
-- 
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