--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libcxx/include/complex.h	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,36 @@
+// -*- C++ -*-
+//===--------------------------- complex.h --------------------------------===//
+//
+// 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_COMPLEX_H
+#define _LIBCPP_COMPLEX_H
+
+/*
+    complex.h synopsis
+
+#include <ccomplex>
+
+*/
+
+#include <__config>
+
+#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
+#pragma GCC system_header
+#endif
+
+#ifdef __cplusplus
+
+#include <ccomplex>
+
+#else  // __cplusplus
+
+#include_next <complex.h>
+
+#endif  // __cplusplus
+
+#endif  // _LIBCPP_COMPLEX_H