1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
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
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP___CONFIGURATION_COMPILER_H
11#define _LIBCPP___CONFIGURATION_COMPILER_H
12
13#include <__config_site>
14
15#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
16# pragma GCC system_header
17#endif
18
19#if defined(__apple_build_version__)
20// Given AppleClang XX.Y.Z, _LIBCPP_APPLE_CLANG_VER is XXYZ (e.g. AppleClang 14.0.3 => 1403)
21# define _LIBCPP_COMPILER_CLANG_BASED
22# define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000)
23#elif defined(__clang__)
24# define _LIBCPP_COMPILER_CLANG_BASED
25# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__)
26#elif defined(__GNUC__)
27# define _LIBCPP_COMPILER_GCC
28# define _LIBCPP_GCC_VER (__GNUC__ * 100 + __GNUC_MINOR__)
29#endif
30
31#ifdef __cplusplus
32
33// Warn if a compiler version is used that is not supported anymore
34// LLVM RELEASE Update the minimum compiler versions
35# if defined(_LIBCPP_CLANG_VER)
36# if _LIBCPP_CLANG_VER < 2101
37# warning "Libc++ only supports Clang 21 and later"
38# endif
39# elif defined(_LIBCPP_APPLE_CLANG_VER)
40# if _LIBCPP_APPLE_CLANG_VER < 2100
41# warning "Libc++ only supports AppleClang 26.4 and later"
42# endif
43# elif defined(_LIBCPP_GCC_VER)
44# if _LIBCPP_GCC_VER < 1500
45# warning "Libc++ only supports GCC 15 and later"
46# endif
47# endif
48
49# ifndef __has_constexpr_builtin
50# define __has_constexpr_builtin(x) 0
51# endif
52
53// This checks wheter a Clang module is built
54# ifndef __building_module
55# define __building_module(...) 0
56# endif
57
58// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by
59// the compiler and '1' otherwise.
60# ifndef __is_identifier
61# define __is_identifier(__x) 1
62# endif
63
64# define __has_keyword(__x) !(__is_identifier(__x))
65
66# ifndef __has_warning
67# define __has_warning(...) 0
68# endif
69
70# if !defined(_LIBCPP_COMPILER_CLANG_BASED) && __cplusplus < 201103L
71# error "libc++ only supports C++03 with Clang-based compilers. Please enable C++11"
72# endif
73
74#endif
75
76#endif // _LIBCPP___CONFIGURATION_COMPILER_H
77