2 //===----------------------------------------------------------------------===//
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
8 //===----------------------------------------------------------------------===//
10 #ifndef _LIBCPP_CSTDALIGN
11 #define _LIBCPP_CSTDALIGN
23 #if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
24 # include <__cxx03/__config>
28 // <stdalign.h> is not provided by libc++
29 # if __has_include(<stdalign.h>)
30 # include <stdalign.h>
31 # ifdef _LIBCPP_STDALIGN_H
32 # error "If libc++ starts defining <stdalign.h>, the __has_include check should move to libc++'s <stdalign.h>"
36 # if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
37 # pragma GCC system_header
40 # undef __alignas_is_defined
41 # define __alignas_is_defined 1
43 # undef __alignof_is_defined
44 # define __alignof_is_defined 1
46 # if _LIBCPP_STD_VER >= 20
48 using __standard_header_cstdalign _LIBCPP_DEPRECATED_("removed in C++20.") = void;
49 using __use_standard_header_cstdalign = __standard_header_cstdalign;
51 # elif _LIBCPP_STD_VER >= 17
53 using __standard_header_cstdalign _LIBCPP_DEPRECATED = void;
54 using __use_standard_header_cstdalign = __standard_header_cstdalign;
57 #endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
59 #endif // _LIBCPP_CSTDALIGN