1// -*- C++ -*-
2//===--------------------------- __config ---------------------------------===//
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_CONFIG
11#define _LIBCPP_CONFIG
12
13#if defined(_MSC_VER) && !defined(__clang__)
14# if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
15# define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
16# endif
17#endif
18
19#ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
20#pragma GCC system_header
21#endif
22
23#ifdef __cplusplus
24
25#ifdef __GNUC__
26# define _GNUC_VER (__GNUC__ * 100 + __GNUC_MINOR__)
27// The _GNUC_VER_NEW macro better represents the new GCC versioning scheme
28// introduced in GCC 5.0.
29# define _GNUC_VER_NEW (_GNUC_VER * 10 + __GNUC_PATCHLEVEL__)
30#else
31# define _GNUC_VER 0
32# define _GNUC_VER_NEW 0
33#endif
34
35#define _LIBCPP_VERSION 10000
36
37#ifndef _LIBCPP_ABI_VERSION
38# define _LIBCPP_ABI_VERSION 1
39#endif
40
41#ifndef __STDC_HOSTED__
42# define _LIBCPP_FREESTANDING
43#endif
44
45#ifndef _LIBCPP_STD_VER
46# if __cplusplus <= 201103L
47# define _LIBCPP_STD_VER 11
48# elif __cplusplus <= 201402L
49# define _LIBCPP_STD_VER 14
50# elif __cplusplus <= 201703L
51# define _LIBCPP_STD_VER 17
52# else
53# define _LIBCPP_STD_VER 18 // current year, or date of c++2a ratification
54# endif
55#endif // _LIBCPP_STD_VER
56
57#if defined(__ELF__)
58# define _LIBCPP_OBJECT_FORMAT_ELF 1
59#elif defined(__MACH__)
60# define _LIBCPP_OBJECT_FORMAT_MACHO 1
61#elif defined(_WIN32)
62# define _LIBCPP_OBJECT_FORMAT_COFF 1
63#elif defined(__wasm__)
64# define _LIBCPP_OBJECT_FORMAT_WASM 1
65#else
66# error Unknown object file format
67#endif
68
69#if defined(_LIBCPP_ABI_UNSTABLE) || _LIBCPP_ABI_VERSION >= 2
70// Change short string representation so that string data starts at offset 0,
71// improving its alignment in some cases.
72# define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
73// Fix deque iterator type in order to support incomplete types.
74# define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE
75// Fix undefined behavior in how std::list stores its linked nodes.
76# define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB
77// Fix undefined behavior in how __tree stores its end and parent nodes.
78# define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB
79// Fix undefined behavior in how __hash_table stores its pointer types.
80# define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB
81# define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB
82# define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE
83// Don't use a nullptr_t simulation type in C++03 instead using C++11 nullptr
84// provided under the alternate keyword __nullptr, which changes the mangling
85// of nullptr_t. This option is ABI incompatible with GCC in C++03 mode.
86# define _LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR
87// Define the `pointer_safety` enum as a C++11 strongly typed enumeration
88// instead of as a class simulating an enum. If this option is enabled
89// `pointer_safety` and `get_pointer_safety()` will no longer be available
90// in C++03.
91# define _LIBCPP_ABI_POINTER_SAFETY_ENUM_TYPE
92// Define a key function for `bad_function_call` in the library, to centralize
93// its vtable and typeinfo to libc++ rather than having all other libraries
94// using that class define their own copies.
95# define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION
96// Enable optimized version of __do_get_(un)signed which avoids redundant copies.
97# define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET
98// Use the smallest possible integer type to represent the index of the variant.
99// Previously libc++ used "unsigned int" exclusively.
100# define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION
101// Unstable attempt to provide a more optimized std::function
102# define _LIBCPP_ABI_OPTIMIZED_FUNCTION
103// All the regex constants must be distinct and nonzero.
104# define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO
105#elif _LIBCPP_ABI_VERSION == 1
106# if !defined(_LIBCPP_OBJECT_FORMAT_COFF)
107// Enable compiling copies of now inline methods into the dylib to support
108// applications compiled against older libraries. This is unnecessary with
109// COFF dllexport semantics, since dllexport forces a non-inline definition
110// of inline functions to be emitted anyway. Our own non-inline copy would
111// conflict with the dllexport-emitted copy, so we disable it.
112# define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS
113# endif
114// Feature macros for disabling pre ABI v1 features. All of these options
115// are deprecated.
116# if defined(__FreeBSD__)
117# define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR
118# endif
119#endif
120
121#ifdef _LIBCPP_TRIVIAL_PAIR_COPY_CTOR
122#error "_LIBCPP_TRIVIAL_PAIR_COPY_CTOR" is no longer supported. \
123 use _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR instead
124#endif
125
126#define _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_X##_LIBCPP_Y
127#define _LIBCPP_CONCAT(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y)
128
129#ifndef _LIBCPP_ABI_NAMESPACE
130# define _LIBCPP_ABI_NAMESPACE _LIBCPP_CONCAT(__,_LIBCPP_ABI_VERSION)
131#endif
132
133#if __cplusplus < 201103L
134#define _LIBCPP_CXX03_LANG
135#endif
136
137#ifndef __has_attribute
138#define __has_attribute(__x) 0
139#endif
140
141#ifndef __has_builtin
142#define __has_builtin(__x) 0
143#endif
144
145#ifndef __has_extension
146#define __has_extension(__x) 0
147#endif
148
149#ifndef __has_feature
150#define __has_feature(__x) 0
151#endif
152
153#ifndef __has_cpp_attribute
154#define __has_cpp_attribute(__x) 0
155#endif
156
157// '__is_identifier' returns '0' if '__x' is a reserved identifier provided by
158// the compiler and '1' otherwise.
159#ifndef __is_identifier
160#define __is_identifier(__x) 1
161#endif
162
163#ifndef __has_declspec_attribute
164#define __has_declspec_attribute(__x) 0
165#endif
166
167#define __has_keyword(__x) !(__is_identifier(__x))
168
169#ifndef __has_include
170#define __has_include(...) 0
171#endif
172
173#if defined(__clang__)
174# define _LIBCPP_COMPILER_CLANG
175# ifndef __apple_build_version__
176# define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__)
177# endif
178#elif defined(__GNUC__)
179# define _LIBCPP_COMPILER_GCC
180#elif defined(_MSC_VER)
181# define _LIBCPP_COMPILER_MSVC
182#elif defined(__IBMCPP__)
183# define _LIBCPP_COMPILER_IBM
184#endif
185
186#if defined(_LIBCPP_COMPILER_GCC) && __cplusplus < 201103L
187#error "libc++ does not support using GCC with C++03. Please enable C++11"
188#endif
189
190// FIXME: ABI detection should be done via compiler builtin macros. This
191// is just a placeholder until Clang implements such macros. For now assume
192// that Windows compilers pretending to be MSVC++ target the Microsoft ABI,
193// and allow the user to explicitly specify the ABI to handle cases where this
194// heuristic falls short.
195#if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT)
196# error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined"
197#elif defined(_LIBCPP_ABI_FORCE_ITANIUM)
198# define _LIBCPP_ABI_ITANIUM
199#elif defined(_LIBCPP_ABI_FORCE_MICROSOFT)
200# define _LIBCPP_ABI_MICROSOFT
201#else
202# if defined(_WIN32) && defined(_MSC_VER)
203# define _LIBCPP_ABI_MICROSOFT
204# else
205# define _LIBCPP_ABI_ITANIUM
206# endif
207#endif
208
209#if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME)
210# define _LIBCPP_ABI_VCRUNTIME
211#endif
212
213// Need to detect which libc we're using if we're on Linux.
214#if defined(__linux__)
215# include <features.h>
216# if defined(__GLIBC_PREREQ)
217# define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b)
218# else
219# define _LIBCPP_GLIBC_PREREQ(a, b) 0
220# endif // defined(__GLIBC_PREREQ)
221#endif // defined(__linux__)
222
223#ifdef __LITTLE_ENDIAN__
224# if __LITTLE_ENDIAN__
225# define _LIBCPP_LITTLE_ENDIAN
226# endif // __LITTLE_ENDIAN__
227#endif // __LITTLE_ENDIAN__
228
229#ifdef __BIG_ENDIAN__
230# if __BIG_ENDIAN__
231# define _LIBCPP_BIG_ENDIAN
232# endif // __BIG_ENDIAN__
233#endif // __BIG_ENDIAN__
234
235#ifdef __BYTE_ORDER__
236# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
237# define _LIBCPP_LITTLE_ENDIAN
238# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
239# define _LIBCPP_BIG_ENDIAN
240# endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
241#endif // __BYTE_ORDER__
242
243#ifdef __FreeBSD__
244# include <sys/endian.h>
245# include <osreldate.h>
246# if _BYTE_ORDER == _LITTLE_ENDIAN
247# define _LIBCPP_LITTLE_ENDIAN
248# else // _BYTE_ORDER == _LITTLE_ENDIAN
249# define _LIBCPP_BIG_ENDIAN
250# endif // _BYTE_ORDER == _LITTLE_ENDIAN
251# ifndef __LONG_LONG_SUPPORTED
252# define _LIBCPP_HAS_NO_LONG_LONG
253# endif // __LONG_LONG_SUPPORTED
254#endif // __FreeBSD__
255
256#ifdef __NetBSD__
257# include <sys/endian.h>
258# if _BYTE_ORDER == _LITTLE_ENDIAN
259# define _LIBCPP_LITTLE_ENDIAN
260# else // _BYTE_ORDER == _LITTLE_ENDIAN
261# define _LIBCPP_BIG_ENDIAN
262# endif // _BYTE_ORDER == _LITTLE_ENDIAN
263#endif // __NetBSD__
264
265#if defined(_WIN32)
266# define _LIBCPP_WIN32API
267# define _LIBCPP_LITTLE_ENDIAN
268# define _LIBCPP_SHORT_WCHAR 1
269// Both MinGW and native MSVC provide a "MSVC"-like environment
270# define _LIBCPP_MSVCRT_LIKE
271// If mingw not explicitly detected, assume using MS C runtime only if
272// a MS compatibility version is specified.
273# if defined(_MSC_VER) && !defined(__MINGW32__)
274# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library
275# endif
276# if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__))
277# define _LIBCPP_HAS_BITSCAN64
278# endif
279# define _LIBCPP_HAS_OPEN_WITH_WCHAR
280# if defined(_LIBCPP_MSVCRT)
281# define _LIBCPP_HAS_QUICK_EXIT
282# endif
283
284// Some CRT APIs are unavailable to store apps
285# if defined(WINAPI_FAMILY)
286# include <winapifamily.h>
287# if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && \
288 (!defined(WINAPI_PARTITION_SYSTEM) || \
289 !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_SYSTEM))
290# define _LIBCPP_WINDOWS_STORE_APP
291# endif
292# endif
293#endif // defined(_WIN32)
294
295#ifdef __sun__
296# include <sys/isa_defs.h>
297# ifdef _LITTLE_ENDIAN
298# define _LIBCPP_LITTLE_ENDIAN
299# else
300# define _LIBCPP_BIG_ENDIAN
301# endif
302#endif // __sun__
303
304#if defined(__CloudABI__)
305 // Certain architectures provide arc4random(). Prefer using
306 // arc4random() over /dev/{u,}random to make it possible to obtain
307 // random data even when using sandboxing mechanisms such as chroots,
308 // Capsicum, etc.
309# define _LIBCPP_USING_ARC4_RANDOM
310#elif defined(__Fuchsia__) || defined(__wasi__)
311# define _LIBCPP_USING_GETENTROPY
312#elif defined(__native_client__)
313 // NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access,
314 // including accesses to the special files under /dev. C++11's
315 // std::random_device is instead exposed through a NaCl syscall.
316# define _LIBCPP_USING_NACL_RANDOM
317#elif defined(_LIBCPP_WIN32API)
318# define _LIBCPP_USING_WIN32_RANDOM
319#else
320# define _LIBCPP_USING_DEV_RANDOM
321#endif
322
323#if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
324# include <endian.h>
325# if __BYTE_ORDER == __LITTLE_ENDIAN
326# define _LIBCPP_LITTLE_ENDIAN
327# elif __BYTE_ORDER == __BIG_ENDIAN
328# define _LIBCPP_BIG_ENDIAN
329# else // __BYTE_ORDER == __BIG_ENDIAN
330# error unable to determine endian
331# endif
332#endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN)
333
334#if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC)
335# define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi")))
336#else
337# define _LIBCPP_NO_CFI
338#endif
339
340#if __ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103L
341# if defined(__FreeBSD__)
342# define _LIBCPP_HAS_ALIGNED_ALLOC
343# define _LIBCPP_HAS_QUICK_EXIT
344# define _LIBCPP_HAS_C11_FEATURES
345# elif defined(__BIONIC__)
346# define _LIBCPP_HAS_C11_FEATURES
347# if __ANDROID_API__ >= 21
348# define _LIBCPP_HAS_QUICK_EXIT
349# endif
350# if __ANDROID_API__ >= 28
351# define _LIBCPP_HAS_ALIGNED_ALLOC
352# endif
353# if __ANDROID_API__ >= 29
354# define _LIBCPP_HAS_TIMESPEC_GET
355# endif
356# elif defined(__Fuchsia__) || defined(__wasi__) || defined(__NetBSD__)
357# define _LIBCPP_HAS_ALIGNED_ALLOC
358# define _LIBCPP_HAS_QUICK_EXIT
359# define _LIBCPP_HAS_TIMESPEC_GET
360# define _LIBCPP_HAS_C11_FEATURES
361# elif defined(__linux__)
362# if !defined(_LIBCPP_HAS_MUSL_LIBC)
363# if _LIBCPP_GLIBC_PREREQ(2, 15) || defined(__BIONIC__)
364# define _LIBCPP_HAS_QUICK_EXIT
365# endif
366# if _LIBCPP_GLIBC_PREREQ(2, 17)
367# define _LIBCPP_HAS_ALIGNED_ALLOC
368# define _LIBCPP_HAS_C11_FEATURES
369# define _LIBCPP_HAS_TIMESPEC_GET
370# endif
371# else // defined(_LIBCPP_HAS_MUSL_LIBC)
372# define _LIBCPP_HAS_ALIGNED_ALLOC
373# define _LIBCPP_HAS_QUICK_EXIT
374# define _LIBCPP_HAS_TIMESPEC_GET
375# define _LIBCPP_HAS_C11_FEATURES
376# endif
377# endif // __linux__
378#endif
379
380#ifndef _LIBCPP_CXX03_LANG
381# define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp)
382#elif defined(_LIBCPP_COMPILER_CLANG)
383# define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp)
384#else
385// This definition is potentially buggy, but it's only taken with GCC in C++03,
386// which we barely support anyway. See llvm.org/PR39713
387# define _LIBCPP_ALIGNOF(_Tp) __alignof(_Tp)
388#endif
389
390#define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp)
391
392#if defined(_LIBCPP_COMPILER_CLANG)
393
394// _LIBCPP_ALTERNATE_STRING_LAYOUT is an old name for
395// _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT left here for backward compatibility.
396#if (defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && \
397 (!defined(__arm__) || __ARM_ARCH_7K__ >= 2)) || \
398 defined(_LIBCPP_ALTERNATE_STRING_LAYOUT)
399#define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT
400#endif
401
402#if __has_feature(cxx_alignas)
403# define _ALIGNAS_TYPE(x) alignas(x)
404# define _ALIGNAS(x) alignas(x)
405#else
406# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
407# define _ALIGNAS(x) __attribute__((__aligned__(x)))
408#endif
409
410#if __cplusplus < 201103L
411typedef __char16_t char16_t;
412typedef __char32_t char32_t;
413#endif
414
415#if !(__has_feature(cxx_exceptions)) && !defined(_LIBCPP_NO_EXCEPTIONS)
416#define _LIBCPP_NO_EXCEPTIONS
417#endif
418
419#if !(__has_feature(cxx_rtti)) && !defined(_LIBCPP_NO_RTTI)
420#define _LIBCPP_NO_RTTI
421#endif
422
423#if !(__has_feature(cxx_strong_enums))
424#define _LIBCPP_HAS_NO_STRONG_ENUMS
425#endif
426
427#if __has_feature(cxx_attributes)
428# define _LIBCPP_NORETURN [[noreturn]]
429#else
430# define _LIBCPP_NORETURN __attribute__ ((noreturn))
431#endif
432
433#if !(__has_feature(cxx_lambdas))
434#define _LIBCPP_HAS_NO_LAMBDAS
435#endif
436
437#if !(__has_feature(cxx_nullptr))
438# if (__has_extension(cxx_nullptr) || __has_keyword(__nullptr)) && defined(_LIBCPP_ABI_ALWAYS_USE_CXX11_NULLPTR)
439# define nullptr __nullptr
440# else
441# define _LIBCPP_HAS_NO_NULLPTR
442# endif
443#endif
444
445#if !(__has_feature(cxx_rvalue_references))
446#define _LIBCPP_HAS_NO_RVALUE_REFERENCES
447#endif
448
449#if !(__has_feature(cxx_auto_type))
450#define _LIBCPP_HAS_NO_AUTO_TYPE
451#endif
452
453#if !(__has_feature(cxx_variadic_templates))
454#define _LIBCPP_HAS_NO_VARIADICS
455#endif
456
457// Objective-C++ features (opt-in)
458#if __has_feature(objc_arc)
459#define _LIBCPP_HAS_OBJC_ARC
460#endif
461
462#if __has_feature(objc_arc_weak)
463#define _LIBCPP_HAS_OBJC_ARC_WEAK
464#endif
465
466#if !(__has_feature(cxx_relaxed_constexpr))
467#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR
468#endif
469
470#if !(__has_feature(cxx_variable_templates))
471#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
472#endif
473
474#if !(__has_feature(cxx_noexcept))
475#define _LIBCPP_HAS_NO_NOEXCEPT
476#endif
477
478#if !defined(_LIBCPP_HAS_NO_ASAN) && !__has_feature(address_sanitizer)
479#define _LIBCPP_HAS_NO_ASAN
480#endif
481
482// Allow for build-time disabling of unsigned integer sanitization
483#if !defined(_LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK) && __has_attribute(no_sanitize)
484#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow")))
485#endif
486
487#if __has_builtin(__builtin_launder)
488#define _LIBCPP_COMPILER_HAS_BUILTIN_LAUNDER
489#endif
490
491#if !__is_identifier(__has_unique_object_representations)
492#define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS
493#endif
494
495#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
496
497// Literal operators ""d and ""y are supported starting with LLVM Clang 8 and AppleClang 10.0.1
498#if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 800) || \
499 (defined(__apple_build_version__) && __apple_build_version__ < 10010000)
500#define _LIBCPP_HAS_NO_CXX20_CHRONO_LITERALS
501#endif
502
503#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__
504
505#elif defined(_LIBCPP_COMPILER_GCC)
506
507#define _ALIGNAS(x) __attribute__((__aligned__(x)))
508#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
509
510#define _LIBCPP_NORETURN __attribute__((noreturn))
511
512#if !__EXCEPTIONS && !defined(_LIBCPP_NO_EXCEPTIONS)
513#define _LIBCPP_NO_EXCEPTIONS
514#endif
515
516// Determine if GCC supports relaxed constexpr
517#if !defined(__cpp_constexpr) || __cpp_constexpr < 201304L
518#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR
519#endif
520
521// GCC 5 supports variable templates
522#if !defined(__cpp_variable_templates) || __cpp_variable_templates < 201304L
523#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
524#endif
525
526#if !defined(_LIBCPP_HAS_NO_ASAN) && !defined(__SANITIZE_ADDRESS__)
527#define _LIBCPP_HAS_NO_ASAN
528#endif
529
530#if _GNUC_VER >= 700
531#define _LIBCPP_COMPILER_HAS_BUILTIN_LAUNDER
532#endif
533
534#if _GNUC_VER >= 700
535#define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS
536#endif
537
538#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
539
540#define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__
541
542#elif defined(_LIBCPP_COMPILER_MSVC)
543
544#define _LIBCPP_TOSTRING2(x) #x
545#define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x)
546#define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x))
547
548#if _MSC_VER < 1900
549#error "MSVC versions prior to Visual Studio 2015 are not supported"
550#endif
551
552#define _LIBCPP_HAS_NO_CXX14_CONSTEXPR
553#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
554#define __alignof__ __alignof
555#define _LIBCPP_NORETURN __declspec(noreturn)
556#define _ALIGNAS(x) __declspec(align(x))
557#define _ALIGNAS_TYPE(x) alignas(x)
558
559#define _LIBCPP_WEAK
560
561#define _LIBCPP_HAS_NO_ASAN
562
563#define _LIBCPP_ALWAYS_INLINE __forceinline
564
565#define _LIBCPP_HAS_NO_VECTOR_EXTENSION
566
567#define _LIBCPP_DISABLE_EXTENSION_WARNING
568
569#elif defined(_LIBCPP_COMPILER_IBM)
570
571#define _ALIGNAS(x) __attribute__((__aligned__(x)))
572#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x))))
573#define _ATTRIBUTE(x) __attribute__((x))
574#define _LIBCPP_NORETURN __attribute__((noreturn))
575
576#define _LIBCPP_HAS_NO_UNICODE_CHARS
577#define _LIBCPP_HAS_NO_VARIABLE_TEMPLATES
578
579#if defined(_AIX)
580#define __MULTILOCALE_API
581#endif
582
583#define _LIBCPP_HAS_NO_ASAN
584
585#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
586
587#define _LIBCPP_HAS_NO_VECTOR_EXTENSION
588
589#define _LIBCPP_DISABLE_EXTENSION_WARNING
590
591#endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM]
592
593#if defined(_LIBCPP_OBJECT_FORMAT_COFF)
594
595#ifdef _DLL
596# define _LIBCPP_CRT_FUNC __declspec(dllimport)
597#else
598# define _LIBCPP_CRT_FUNC
599#endif
600
601#if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
602# define _LIBCPP_DLL_VIS
603# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
604# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
605# define _LIBCPP_OVERRIDABLE_FUNC_VIS
606# define _LIBCPP_EXPORTED_FROM_ABI
607#elif defined(_LIBCPP_BUILDING_LIBRARY)
608# define _LIBCPP_DLL_VIS __declspec(dllexport)
609# if defined(__MINGW32__)
610# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS
611# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
612# else
613# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
614# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS
615# endif
616# define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS
617# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport)
618#else
619# define _LIBCPP_DLL_VIS __declspec(dllimport)
620# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS
621# define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
622# define _LIBCPP_OVERRIDABLE_FUNC_VIS
623# define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport)
624#endif
625
626#define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS
627#define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS
628#define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS
629#define _LIBCPP_HIDDEN
630#define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
631#define _LIBCPP_TEMPLATE_VIS
632#define _LIBCPP_ENUM_VIS
633
634#endif // defined(_LIBCPP_OBJECT_FORMAT_COFF)
635
636#ifndef _LIBCPP_HIDDEN
637# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
638# define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden")))
639# else
640# define _LIBCPP_HIDDEN
641# endif
642#endif
643
644#ifndef _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
645# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
646// The inline should be removed once PR32114 is resolved
647# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN
648# else
649# define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS
650# endif
651#endif
652
653#ifndef _LIBCPP_FUNC_VIS
654# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
655# define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default")))
656# else
657# define _LIBCPP_FUNC_VIS
658# endif
659#endif
660
661#ifndef _LIBCPP_TYPE_VIS
662# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
663# define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default")))
664# else
665# define _LIBCPP_TYPE_VIS
666# endif
667#endif
668
669#ifndef _LIBCPP_TEMPLATE_VIS
670# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
671# if __has_attribute(__type_visibility__)
672# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__type_visibility__("default")))
673# else
674# define _LIBCPP_TEMPLATE_VIS __attribute__ ((__visibility__("default")))
675# endif
676# else
677# define _LIBCPP_TEMPLATE_VIS
678# endif
679#endif
680
681#ifndef _LIBCPP_EXPORTED_FROM_ABI
682# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
683# define _LIBCPP_EXPORTED_FROM_ABI __attribute__((__visibility__("default")))
684# else
685# define _LIBCPP_EXPORTED_FROM_ABI
686# endif
687#endif
688
689#ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS
690#define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS
691#endif
692
693#ifndef _LIBCPP_EXCEPTION_ABI
694# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS)
695# define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default")))
696# else
697# define _LIBCPP_EXCEPTION_ABI
698# endif
699#endif
700
701#ifndef _LIBCPP_ENUM_VIS
702# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__)
703# define _LIBCPP_ENUM_VIS __attribute__ ((__type_visibility__("default")))
704# else
705# define _LIBCPP_ENUM_VIS
706# endif
707#endif
708
709#ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
710# if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__)
711# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__ ((__visibility__("default")))
712# else
713# define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS
714# endif
715#endif
716
717#ifndef _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
718#define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS
719#endif
720
721#if __has_attribute(internal_linkage)
722# define _LIBCPP_INTERNAL_LINKAGE __attribute__ ((internal_linkage))
723#else
724# define _LIBCPP_INTERNAL_LINKAGE _LIBCPP_ALWAYS_INLINE
725#endif
726
727#if __has_attribute(exclude_from_explicit_instantiation)
728# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__ ((__exclude_from_explicit_instantiation__))
729#else
730 // Try to approximate the effect of exclude_from_explicit_instantiation
731 // (which is that entities are not assumed to be provided by explicit
732 // template instantiations in the dylib) by always inlining those entities.
733# define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE
734#endif
735
736#ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU
737# ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT
738# define _LIBCPP_HIDE_FROM_ABI_PER_TU 0
739# else
740# define _LIBCPP_HIDE_FROM_ABI_PER_TU 1
741# endif
742#endif
743
744#ifndef _LIBCPP_HAS_MERGED_TYPEINFO_NAMES_DEFAULT
745# ifdef _LIBCPP_OBJECT_FORMAT_COFF // Windows binaries can't merge typeinfos.
746# define _LIBCPP_HAS_MERGED_TYPEINFO_NAMES_DEFAULT 0
747#else
748// TODO: This isn't strictly correct on ELF platforms due to llvm.org/PR37398
749// And we should consider defaulting to OFF.
750# define _LIBCPP_HAS_MERGED_TYPEINFO_NAMES_DEFAULT 1
751#endif
752#endif
753
754#ifndef _LIBCPP_HIDE_FROM_ABI
755# if _LIBCPP_HIDE_FROM_ABI_PER_TU
756# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_INTERNAL_LINKAGE
757# else
758# define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION
759# endif
760#endif
761
762#ifdef _LIBCPP_BUILDING_LIBRARY
763# if _LIBCPP_ABI_VERSION > 1
764# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
765# else
766# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1
767# endif
768#else
769# define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI
770#endif
771
772// Just so we can migrate to the new macros gradually.
773#define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI
774
775// Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect.
776#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE {
777#define _LIBCPP_END_NAMESPACE_STD } }
778#define _VSTD std::_LIBCPP_ABI_NAMESPACE
779_LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD
780
781#if _LIBCPP_STD_VER >= 17
782#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \
783 _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem {
784#else
785#define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \
786 _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem {
787#endif
788
789#define _LIBCPP_END_NAMESPACE_FILESYSTEM \
790 _LIBCPP_END_NAMESPACE_STD } }
791
792#define _VSTD_FS _VSTD::__fs::filesystem
793
794#ifndef _LIBCPP_PREFERRED_OVERLOAD
795# if __has_attribute(__enable_if__)
796# define _LIBCPP_PREFERRED_OVERLOAD __attribute__ ((__enable_if__(true, "")))
797# endif
798#endif
799
800#ifndef _LIBCPP_HAS_NO_NOEXCEPT
801# define _NOEXCEPT noexcept
802# define _NOEXCEPT_(x) noexcept(x)
803#else
804# define _NOEXCEPT throw()
805# define _NOEXCEPT_(x)
806#endif
807
808#ifdef _LIBCPP_HAS_NO_UNICODE_CHARS
809typedef unsigned short char16_t;
810typedef unsigned int char32_t;
811#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
812
813#ifndef __SIZEOF_INT128__
814#define _LIBCPP_HAS_NO_INT128
815#endif
816
817#ifdef _LIBCPP_CXX03_LANG
818# define static_assert(...) _Static_assert(__VA_ARGS__)
819# define decltype(...) __decltype(__VA_ARGS__)
820#endif // _LIBCPP_CXX03_LANG
821
822#ifdef _LIBCPP_CXX03_LANG
823# define _LIBCPP_CONSTEXPR
824#else
825# define _LIBCPP_CONSTEXPR constexpr
826#endif
827
828#ifdef _LIBCPP_CXX03_LANG
829# define _LIBCPP_DEFAULT {}
830#else
831# define _LIBCPP_DEFAULT = default;
832#endif
833
834#ifdef _LIBCPP_CXX03_LANG
835# define _LIBCPP_EQUAL_DELETE
836#else
837# define _LIBCPP_EQUAL_DELETE = delete
838#endif
839
840#ifdef __GNUC__
841# define _LIBCPP_NOALIAS __attribute__((__malloc__))
842#else
843# define _LIBCPP_NOALIAS
844#endif
845
846#if __has_feature(cxx_explicit_conversions) || defined(__IBMCPP__) || \
847 (!defined(_LIBCPP_CXX03_LANG) && defined(__GNUC__)) // All supported GCC versions
848# define _LIBCPP_EXPLICIT explicit
849#else
850# define _LIBCPP_EXPLICIT
851#endif
852
853#if !__has_builtin(__builtin_operator_new) || !__has_builtin(__builtin_operator_delete)
854#define _LIBCPP_HAS_NO_BUILTIN_OPERATOR_NEW_DELETE
855#endif
856
857#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
858# define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx
859# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \
860 __lx __v_; \
861 _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \
862 _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \
863 _LIBCPP_INLINE_VISIBILITY operator int() const {return __v_;} \
864 };
865#else // _LIBCPP_HAS_NO_STRONG_ENUMS
866# define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x
867# define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)
868#endif // _LIBCPP_HAS_NO_STRONG_ENUMS
869
870#ifdef _LIBCPP_DEBUG
871# if _LIBCPP_DEBUG == 0
872# define _LIBCPP_DEBUG_LEVEL 1
873# elif _LIBCPP_DEBUG == 1
874# define _LIBCPP_DEBUG_LEVEL 2
875# else
876# error Supported values for _LIBCPP_DEBUG are 0 and 1
877# endif
878# if !defined(_LIBCPP_BUILDING_LIBRARY)
879# define _LIBCPP_EXTERN_TEMPLATE(...)
880# endif
881#endif
882
883#ifndef _LIBCPP_DEBUG_LEVEL
884# define _LIBCPP_DEBUG_LEVEL 0
885#endif
886
887#ifdef _LIBCPP_DISABLE_EXTERN_TEMPLATE
888#define _LIBCPP_EXTERN_TEMPLATE(...)
889#define _LIBCPP_EXTERN_TEMPLATE2(...)
890#endif
891
892#ifndef _LIBCPP_EXTERN_TEMPLATE
893#define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__;
894#endif
895
896#ifndef _LIBCPP_EXTERN_TEMPLATE2
897#define _LIBCPP_EXTERN_TEMPLATE2(...) extern template __VA_ARGS__;
898#endif
899
900#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || \
901 defined(__sun__) || defined(__NetBSD__) || defined(__CloudABI__)
902#define _LIBCPP_LOCALE__L_EXTENSIONS 1
903#endif
904
905#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
906// Most unix variants have catopen. These are the specific ones that don't.
907# if !defined(__BIONIC__) && !defined(_NEWLIB_VERSION)
908# define _LIBCPP_HAS_CATOPEN 1
909# endif
910#endif
911
912#ifdef __FreeBSD__
913#define _DECLARE_C99_LDBL_MATH 1
914#endif
915
916// If we are getting operator new from the MSVC CRT, then allocation overloads
917// for align_val_t were added in 19.12, aka VS 2017 version 15.3.
918#if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912
919# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
920#elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new)
921 // We're deferring to Microsoft's STL to provide aligned new et al. We don't
922 // have it unless the language feature test macro is defined.
923# define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION
924#endif
925
926#if defined(__APPLE__)
927# if !defined(__MAC_OS_X_VERSION_MIN_REQUIRED) && \
928 defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__)
929# define __MAC_OS_X_VERSION_MIN_REQUIRED __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__
930# endif
931#endif // defined(__APPLE__)
932
933#if !defined(_LIBCPP_HAS_NO_ALIGNED_ALLOCATION) && \
934 (defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || \
935 (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606))
936# define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION
937#endif
938
939#if defined(__APPLE__) || defined(__FreeBSD__)
940#define _LIBCPP_HAS_DEFAULTRUNELOCALE
941#endif
942
943#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__)
944#define _LIBCPP_WCTYPE_IS_MASK
945#endif
946
947#if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t)
948#define _LIBCPP_NO_HAS_CHAR8_T
949#endif
950
951// Deprecation macros.
952//
953// Deprecations warnings are always enabled, except when users explicitly opt-out
954// by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS.
955#if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS)
956# if __has_attribute(deprecated)
957# define _LIBCPP_DEPRECATED __attribute__ ((deprecated))
958# elif _LIBCPP_STD_VER > 11
959# define _LIBCPP_DEPRECATED [[deprecated]]
960# else
961# define _LIBCPP_DEPRECATED
962# endif
963#else
964# define _LIBCPP_DEPRECATED
965#endif
966
967#if !defined(_LIBCPP_CXX03_LANG)
968# define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED
969#else
970# define _LIBCPP_DEPRECATED_IN_CXX11
971#endif
972
973#if _LIBCPP_STD_VER >= 14
974# define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED
975#else
976# define _LIBCPP_DEPRECATED_IN_CXX14
977#endif
978
979#if _LIBCPP_STD_VER >= 17
980# define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED
981#else
982# define _LIBCPP_DEPRECATED_IN_CXX17
983#endif
984
985// Macros to enter and leave a state where deprecation warnings are suppressed.
986#if !defined(_LIBCPP_SUPPRESS_DEPRECATED_PUSH) && \
987 (defined(_LIBCPP_COMPILER_CLANG) || defined(_LIBCPP_COMPILER_GCC))
988# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \
989 _Pragma("GCC diagnostic push") \
990 _Pragma("GCC diagnostic ignored \"-Wdeprecated\"")
991# define _LIBCPP_SUPPRESS_DEPRECATED_POP \
992 _Pragma("GCC diagnostic pop")
993#endif
994#if !defined(_LIBCPP_SUPPRESS_DEPRECATED_PUSH)
995# define _LIBCPP_SUPPRESS_DEPRECATED_PUSH
996# define _LIBCPP_SUPPRESS_DEPRECATED_POP
997#endif
998
999#if _LIBCPP_STD_VER <= 11
1000# define _LIBCPP_EXPLICIT_AFTER_CXX11
1001#else
1002# define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit
1003#endif
1004
1005#if _LIBCPP_STD_VER > 11 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
1006# define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr
1007#else
1008# define _LIBCPP_CONSTEXPR_AFTER_CXX11
1009#endif
1010
1011#if _LIBCPP_STD_VER > 14 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
1012# define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr
1013#else
1014# define _LIBCPP_CONSTEXPR_AFTER_CXX14
1015#endif
1016
1017#if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
1018# define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr
1019#else
1020# define _LIBCPP_CONSTEXPR_AFTER_CXX17
1021#endif
1022
1023#if _LIBCPP_STD_VER > 17 && \
1024 !defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR) && \
1025 !defined(_LIBCPP_HAS_NO_BUILTIN_IS_CONSTANT_EVALUATED)
1026# define _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED constexpr
1027#else
1028# define _LIBCPP_CONSTEXPR_AFTER_CXX17_WITH_IS_CONSTANT_EVALUATED
1029#endif
1030
1031// The _LIBCPP_NODISCARD_ATTRIBUTE should only be used to define other
1032// NODISCARD macros to the correct attribute.
1033#if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC)
1034# define _LIBCPP_NODISCARD_ATTRIBUTE [[nodiscard]]
1035#elif defined(_LIBCPP_COMPILER_CLANG) && !defined(_LIBCPP_CXX03_LANG)
1036# define _LIBCPP_NODISCARD_ATTRIBUTE [[clang::warn_unused_result]]
1037#else
1038// We can't use GCC's [[gnu::warn_unused_result]] and
1039// __attribute__((warn_unused_result)), because GCC does not silence them via
1040// (void) cast.
1041# define _LIBCPP_NODISCARD_ATTRIBUTE
1042#endif
1043
1044// _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not
1045// specified as such as an extension.
1046#if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT)
1047# define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD_ATTRIBUTE
1048#else
1049# define _LIBCPP_NODISCARD_EXT
1050#endif
1051
1052#if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && \
1053 (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD))
1054# define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD_ATTRIBUTE
1055#else
1056# define _LIBCPP_NODISCARD_AFTER_CXX17
1057#endif
1058
1059#if _LIBCPP_STD_VER > 14 && defined(__cpp_inline_variables) && (__cpp_inline_variables >= 201606L)
1060# define _LIBCPP_INLINE_VAR inline
1061#else
1062# define _LIBCPP_INLINE_VAR
1063#endif
1064
1065#ifdef _LIBCPP_HAS_NO_RVALUE_REFERENCES
1066# define _LIBCPP_EXPLICIT_MOVE(x) _VSTD::move(x)
1067#else
1068# define _LIBCPP_EXPLICIT_MOVE(x) (x)
1069#endif
1070
1071#ifndef _LIBCPP_CONSTEXPR_IF_NODEBUG
1072#if defined(_LIBCPP_DEBUG) || defined(_LIBCPP_HAS_NO_CXX14_CONSTEXPR)
1073#define _LIBCPP_CONSTEXPR_IF_NODEBUG
1074#else
1075#define _LIBCPP_CONSTEXPR_IF_NODEBUG constexpr
1076#endif
1077#endif
1078
1079#if __has_attribute(no_destroy)
1080# define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__))
1081#else
1082# define _LIBCPP_NO_DESTROY
1083#endif
1084
1085#ifndef _LIBCPP_HAS_NO_ASAN
1086_LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container(
1087 const void *, const void *, const void *, const void *);
1088#endif
1089
1090// Try to find out if RTTI is disabled.
1091// g++ and cl.exe have RTTI on by default and define a macro when it is.
1092// g++ only defines the macro in 4.3.2 and onwards.
1093#if !defined(_LIBCPP_NO_RTTI)
1094# if defined(__GNUC__) && \
1095 ((__GNUC__ >= 5) || \
1096 (__GNUC__ == 4 && (__GNUC_MINOR__ >= 3 || __GNUC_PATCHLEVEL__ >= 2))) && \
1097 !defined(__GXX_RTTI)
1098# define _LIBCPP_NO_RTTI
1099# elif defined(_LIBCPP_COMPILER_MSVC) && !defined(_CPPRTTI)
1100# define _LIBCPP_NO_RTTI
1101# endif
1102#endif
1103
1104#ifndef _LIBCPP_WEAK
1105#define _LIBCPP_WEAK __attribute__((__weak__))
1106#endif
1107
1108// Thread API
1109#if !defined(_LIBCPP_HAS_NO_THREADS) && \
1110 !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \
1111 !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \
1112 !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
1113# if defined(__FreeBSD__) || \
1114 defined(__Fuchsia__) || \
1115 defined(__wasi__) || \
1116 defined(__NetBSD__) || \
1117 defined(__linux__) || \
1118 defined(__GNU__) || \
1119 defined(__APPLE__) || \
1120 defined(__CloudABI__) || \
1121 defined(__sun__) || \
1122 (defined(__MINGW32__) && __has_include(<pthread.h>))
1123# define _LIBCPP_HAS_THREAD_API_PTHREAD
1124# elif defined(_LIBCPP_WIN32API)
1125# define _LIBCPP_HAS_THREAD_API_WIN32
1126# else
1127# error "No thread API"
1128# endif // _LIBCPP_HAS_THREAD_API
1129#endif // _LIBCPP_HAS_NO_THREADS
1130
1131#if defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
1132#if defined(__ANDROID__) && __ANDROID_API__ >= 30
1133#define _LIBCPP_HAS_COND_CLOCKWAIT
1134#elif defined(_LIBCPP_GLIBC_PREREQ)
1135#if _LIBCPP_GLIBC_PREREQ(2, 30)
1136#define _LIBCPP_HAS_COND_CLOCKWAIT
1137#endif
1138#endif
1139#endif
1140
1141#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
1142#error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \
1143 _LIBCPP_HAS_NO_THREADS is not defined.
1144#endif
1145
1146#if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL)
1147#error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \
1148 _LIBCPP_HAS_NO_THREADS is defined.
1149#endif
1150
1151#if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS)
1152#error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \
1153 _LIBCPP_HAS_NO_THREADS is defined.
1154#endif
1155
1156#if defined(__STDCPP_THREADS__) && defined(_LIBCPP_HAS_NO_THREADS)
1157#error _LIBCPP_HAS_NO_THREADS cannot be set when __STDCPP_THREADS__ is set.
1158#endif
1159
1160#if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__)
1161#define __STDCPP_THREADS__ 1
1162#endif
1163
1164// The glibc and Bionic implementation of pthreads implements
1165// pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32
1166// mutexes have no destroy mechanism.
1167//
1168// This optimization can't be performed on Apple platforms, where
1169// pthread_mutex_destroy can allow the kernel to release resources.
1170// See https://llvm.org/D64298 for details.
1171//
1172// TODO(EricWF): Enable this optimization on Bionic after speaking to their
1173// respective stakeholders.
1174#if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) \
1175 || defined(_LIBCPP_HAS_THREAD_API_WIN32)
1176# define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION
1177#endif
1178
1179// Destroying a condvar is a nop on Windows.
1180//
1181// This optimization can't be performed on Apple platforms, where
1182// pthread_cond_destroy can allow the kernel to release resources.
1183// See https://llvm.org/D64298 for details.
1184//
1185// TODO(EricWF): This is potentially true for some pthread implementations
1186// as well.
1187#if defined(_LIBCPP_HAS_THREAD_API_WIN32)
1188# define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION
1189#endif
1190
1191// Systems that use capability-based security (FreeBSD with Capsicum,
1192// Nuxi CloudABI) may only provide local filesystem access (using *at()).
1193// Functions like open(), rename(), unlink() and stat() should not be
1194// used, as they attempt to access the global filesystem namespace.
1195#ifdef __CloudABI__
1196#define _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
1197#endif
1198
1199// CloudABI is intended for running networked services. Processes do not
1200// have standard input and output channels.
1201#ifdef __CloudABI__
1202#define _LIBCPP_HAS_NO_STDIN
1203#define _LIBCPP_HAS_NO_STDOUT
1204#endif
1205
1206// Some systems do not provide gets() in their C library, for security reasons.
1207#ifndef _LIBCPP_C_HAS_NO_GETS
1208# if defined(_LIBCPP_MSVCRT) || \
1209 (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043)
1210# define _LIBCPP_C_HAS_NO_GETS
1211# endif
1212#endif
1213
1214#if defined(__BIONIC__) || defined(__CloudABI__) || \
1215 defined(__Fuchsia__) || defined(__wasi__) || defined(_LIBCPP_HAS_MUSL_LIBC)
1216#define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE
1217#endif
1218
1219// Thread-unsafe functions such as strtok() and localtime()
1220// are not available.
1221#ifdef __CloudABI__
1222#define _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS
1223#endif
1224
1225#if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic)
1226# define _LIBCPP_HAS_C_ATOMIC_IMP
1227#elif defined(_LIBCPP_COMPILER_GCC)
1228# define _LIBCPP_HAS_GCC_ATOMIC_IMP
1229#endif
1230
1231#if (!defined(_LIBCPP_HAS_C_ATOMIC_IMP) && \
1232 !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \
1233 !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP)) \
1234 || defined(_LIBCPP_HAS_NO_THREADS)
1235# define _LIBCPP_HAS_NO_ATOMIC_HEADER
1236#else
1237# ifndef _LIBCPP_ATOMIC_FLAG_TYPE
1238# define _LIBCPP_ATOMIC_FLAG_TYPE bool
1239# endif
1240# ifdef _LIBCPP_FREESTANDING
1241# define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS
1242# endif
1243#endif
1244
1245#ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK
1246#define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK
1247#endif
1248
1249#if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS)
1250# if defined(__clang__) && __has_attribute(acquire_capability)
1251// Work around the attribute handling in clang. When both __declspec and
1252// __attribute__ are present, the processing goes awry preventing the definition
1253// of the types.
1254# if !defined(_LIBCPP_OBJECT_FORMAT_COFF)
1255# define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS
1256# endif
1257# endif
1258#endif
1259
1260#ifndef _LIBCPP_THREAD_SAFETY_ANNOTATION
1261# ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS
1262# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x))
1263# else
1264# define _LIBCPP_THREAD_SAFETY_ANNOTATION(x)
1265# endif
1266#endif // _LIBCPP_THREAD_SAFETY_ANNOTATION
1267
1268#if __has_attribute(require_constant_initialization)
1269# define _LIBCPP_SAFE_STATIC __attribute__((__require_constant_initialization__))
1270#else
1271# define _LIBCPP_SAFE_STATIC
1272#endif
1273
1274#if !__has_builtin(__builtin_addressof) && _GNUC_VER < 700
1275#define _LIBCPP_HAS_NO_BUILTIN_ADDRESSOF
1276#endif
1277
1278#if !__has_builtin(__builtin_is_constant_evaluated) && _GNUC_VER < 900
1279#define _LIBCPP_HAS_NO_BUILTIN_IS_CONSTANT_EVALUATED
1280#endif
1281
1282#if !defined(_LIBCPP_HAS_NO_OFF_T_FUNCTIONS)
1283# if defined(_LIBCPP_MSVCRT) || defined(_NEWLIB_VERSION)
1284# define _LIBCPP_HAS_NO_OFF_T_FUNCTIONS
1285# endif
1286#endif
1287
1288#if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS)
1289# define _LIBCPP_DIAGNOSE_WARNING(...) \
1290 __attribute__((diagnose_if(__VA_ARGS__, "warning")))
1291# define _LIBCPP_DIAGNOSE_ERROR(...) \
1292 __attribute__((diagnose_if(__VA_ARGS__, "error")))
1293#else
1294# define _LIBCPP_DIAGNOSE_WARNING(...)
1295# define _LIBCPP_DIAGNOSE_ERROR(...)
1296#endif
1297
1298// Use a function like macro to imply that it must be followed by a semicolon
1299#if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
1300# define _LIBCPP_FALLTHROUGH() [[fallthrough]]
1301#elif __has_cpp_attribute(clang::fallthrough)
1302# define _LIBCPP_FALLTHROUGH() [[clang::fallthrough]]
1303#elif __has_attribute(fallthough) || _GNUC_VER >= 700
1304# define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__))
1305#else
1306# define _LIBCPP_FALLTHROUGH() ((void)0)
1307#endif
1308
1309#if __has_attribute(__nodebug__)
1310#define _LIBCPP_NODEBUG __attribute__((__nodebug__))
1311#else
1312#define _LIBCPP_NODEBUG
1313#endif
1314
1315#ifndef _LIBCPP_NODEBUG_TYPE
1316#if __has_attribute(__nodebug__) && \
1317 (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER >= 900)
1318#define _LIBCPP_NODEBUG_TYPE __attribute__((nodebug))
1319#else
1320#define _LIBCPP_NODEBUG_TYPE
1321#endif
1322#endif // !defined(_LIBCPP_NODEBUG_TYPE)
1323
1324#if defined(_LIBCPP_ABI_MICROSOFT) && \
1325 (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases))
1326# define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases)
1327#else
1328# define _LIBCPP_DECLSPEC_EMPTY_BASES
1329#endif
1330
1331#if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES)
1332#define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR
1333#define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS
1334#define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE
1335#define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS
1336#endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES
1337
1338#if !defined(__cpp_deduction_guides) || __cpp_deduction_guides < 201611
1339#define _LIBCPP_HAS_NO_DEDUCTION_GUIDES
1340#endif
1341
1342#if !__has_keyword(__is_aggregate) && (_GNUC_VER_NEW < 7001)
1343#define _LIBCPP_HAS_NO_IS_AGGREGATE
1344#endif
1345
1346#if !defined(__cpp_coroutines) || __cpp_coroutines < 201703L
1347#define _LIBCPP_HAS_NO_COROUTINES
1348#endif
1349
1350// FIXME: Correct this macro when either (A) a feature test macro for the
1351// spaceship operator is provided, or (B) a compiler provides a complete
1352// implementation.
1353#define _LIBCPP_HAS_NO_SPACESHIP_OPERATOR
1354
1355// Decide whether to use availability macros.
1356#if !defined(_LIBCPP_BUILDING_LIBRARY) && \
1357 !defined(_LIBCPP_DISABLE_AVAILABILITY) && \
1358 __has_feature(attribute_availability_with_strict) && \
1359 __has_feature(attribute_availability_in_templates) && \
1360 __has_extension(pragma_clang_attribute_external_declaration)
1361# ifdef __APPLE__
1362# define _LIBCPP_USE_AVAILABILITY_APPLE
1363# endif
1364#endif
1365
1366// Define availability macros.
1367#if defined(_LIBCPP_USE_AVAILABILITY_APPLE)
1368# define _LIBCPP_AVAILABILITY_SHARED_MUTEX \
1369 __attribute__((availability(macosx,strict,introduced=10.12))) \
1370 __attribute__((availability(ios,strict,introduced=10.0))) \
1371 __attribute__((availability(tvos,strict,introduced=10.0))) \
1372 __attribute__((availability(watchos,strict,introduced=3.0)))
1373# define _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS \
1374 __attribute__((availability(macosx,strict,introduced=10.14))) \
1375 __attribute__((availability(ios,strict,introduced=12.0))) \
1376 __attribute__((availability(tvos,strict,introduced=12.0))) \
1377 __attribute__((availability(watchos,strict,introduced=5.0)))
1378# define _LIBCPP_AVAILABILITY_BAD_VARIANT_ACCESS \
1379 _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS
1380# define _LIBCPP_AVAILABILITY_BAD_ANY_CAST \
1381 _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS
1382# define _LIBCPP_AVAILABILITY_UNCAUGHT_EXCEPTIONS \
1383 __attribute__((availability(macosx,strict,introduced=10.12))) \
1384 __attribute__((availability(ios,strict,introduced=10.0))) \
1385 __attribute__((availability(tvos,strict,introduced=10.0))) \
1386 __attribute__((availability(watchos,strict,introduced=3.0)))
1387# define _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE \
1388 __attribute__((availability(macosx,strict,introduced=10.12))) \
1389 __attribute__((availability(ios,strict,introduced=10.0))) \
1390 __attribute__((availability(tvos,strict,introduced=10.0))) \
1391 __attribute__((availability(watchos,strict,introduced=3.0)))
1392# define _LIBCPP_AVAILABILITY_FUTURE_ERROR \
1393 __attribute__((availability(ios,strict,introduced=6.0)))
1394# define _LIBCPP_AVAILABILITY_TYPEINFO_VTABLE \
1395 __attribute__((availability(macosx,strict,introduced=10.9))) \
1396 __attribute__((availability(ios,strict,introduced=7.0)))
1397# define _LIBCPP_AVAILABILITY_LOCALE_CATEGORY \
1398 __attribute__((availability(macosx,strict,introduced=10.9))) \
1399 __attribute__((availability(ios,strict,introduced=7.0)))
1400# define _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR \
1401 __attribute__((availability(macosx,strict,introduced=10.9))) \
1402 __attribute__((availability(ios,strict,introduced=7.0)))
1403# define _LIBCPP_AVAILABILITY_FILESYSTEM \
1404 __attribute__((availability(macosx,strict,introduced=10.15))) \
1405 __attribute__((availability(ios,strict,introduced=13.0))) \
1406 __attribute__((availability(tvos,strict,introduced=13.0))) \
1407 __attribute__((availability(watchos,strict,introduced=6.0)))
1408# define _LIBCPP_AVAILABILITY_FILESYSTEM_PUSH \
1409 _Pragma("clang attribute push(__attribute__((availability(macosx,strict,introduced=10.15))), apply_to=any(function,record))") \
1410 _Pragma("clang attribute push(__attribute__((availability(ios,strict,introduced=13.0))), apply_to=any(function,record))") \
1411 _Pragma("clang attribute push(__attribute__((availability(tvos,strict,introduced=13.0))), apply_to=any(function,record))") \
1412 _Pragma("clang attribute push(__attribute__((availability(watchos,strict,introduced=6.0))), apply_to=any(function,record))")
1413# define _LIBCPP_AVAILABILITY_FILESYSTEM_POP \
1414 _Pragma("clang attribute pop") \
1415 _Pragma("clang attribute pop") \
1416 _Pragma("clang attribute pop") \
1417 _Pragma("clang attribute pop")
1418#else
1419# define _LIBCPP_AVAILABILITY_SHARED_MUTEX
1420# define _LIBCPP_AVAILABILITY_BAD_VARIANT_ACCESS
1421# define _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS
1422# define _LIBCPP_AVAILABILITY_BAD_ANY_CAST
1423# define _LIBCPP_AVAILABILITY_UNCAUGHT_EXCEPTIONS
1424# define _LIBCPP_AVAILABILITY_SIZED_NEW_DELETE
1425# define _LIBCPP_AVAILABILITY_FUTURE_ERROR
1426# define _LIBCPP_AVAILABILITY_TYPEINFO_VTABLE
1427# define _LIBCPP_AVAILABILITY_LOCALE_CATEGORY
1428# define _LIBCPP_AVAILABILITY_ATOMIC_SHARED_PTR
1429# define _LIBCPP_AVAILABILITY_FILESYSTEM
1430# define _LIBCPP_AVAILABILITY_FILESYSTEM_PUSH
1431# define _LIBCPP_AVAILABILITY_FILESYSTEM_POP
1432#endif
1433
1434// Define availability that depends on _LIBCPP_NO_EXCEPTIONS.
1435#ifdef _LIBCPP_NO_EXCEPTIONS
1436# define _LIBCPP_AVAILABILITY_FUTURE
1437# define _LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST
1438# define _LIBCPP_AVAILABILITY_THROW_BAD_OPTIONAL_ACCESS
1439# define _LIBCPP_AVAILABILITY_THROW_BAD_VARIANT_ACCESS
1440#else
1441# define _LIBCPP_AVAILABILITY_FUTURE _LIBCPP_AVAILABILITY_FUTURE_ERROR
1442# define _LIBCPP_AVAILABILITY_THROW_BAD_ANY_CAST _LIBCPP_AVAILABILITY_BAD_ANY_CAST
1443# define _LIBCPP_AVAILABILITY_THROW_BAD_OPTIONAL_ACCESS _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS
1444# define _LIBCPP_AVAILABILITY_THROW_BAD_VARIANT_ACCESS _LIBCPP_AVAILABILITY_BAD_VARIANT_ACCESS
1445#endif
1446
1447// The stream API was dropped and re-added in the dylib shipped on macOS
1448// and iOS. We can only assume the dylib to provide these definitions for
1449// macosx >= 10.9 and ios >= 7.0. Otherwise, the definitions are available
1450// from the headers, but not from the dylib. Explicit instantiation
1451// declarations for streams exist conditionally to this; if we provide
1452// an explicit instantiation declaration and we try to deploy to a dylib
1453// that does not provide those symbols, we'll get a load-time error.
1454#if !defined(_LIBCPP_BUILDING_LIBRARY) && \
1455 ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \
1456 __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1090) || \
1457 (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && \
1458 __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 70000))
1459# define _LIBCPP_DO_NOT_ASSUME_STREAMS_EXPLICIT_INSTANTIATION_IN_DYLIB
1460#endif
1461
1462#if defined(_LIBCPP_COMPILER_IBM)
1463#define _LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO
1464#endif
1465
1466#if defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO)
1467# define _LIBCPP_PUSH_MACROS
1468# define _LIBCPP_POP_MACROS
1469#else
1470 // Don't warn about macro conflicts when we can restore them at the
1471 // end of the header.
1472# ifndef _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS
1473# define _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS
1474# endif
1475# if defined(_LIBCPP_COMPILER_MSVC)
1476# define _LIBCPP_PUSH_MACROS \
1477 __pragma(push_macro("min")) \
1478 __pragma(push_macro("max"))
1479# define _LIBCPP_POP_MACROS \
1480 __pragma(pop_macro("min")) \
1481 __pragma(pop_macro("max"))
1482# else
1483# define _LIBCPP_PUSH_MACROS \
1484 _Pragma("push_macro(\"min\")") \
1485 _Pragma("push_macro(\"max\")")
1486# define _LIBCPP_POP_MACROS \
1487 _Pragma("pop_macro(\"min\")") \
1488 _Pragma("pop_macro(\"max\")")
1489# endif
1490#endif // defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO)
1491
1492#ifndef _LIBCPP_NO_AUTO_LINK
1493# if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
1494# if defined(_DLL)
1495# pragma comment(lib, "c++.lib")
1496# else
1497# pragma comment(lib, "libc++.lib")
1498# endif
1499# endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY)
1500#endif // _LIBCPP_NO_AUTO_LINK
1501
1502#define _LIBCPP_UNUSED_VAR(x) ((void)(x))
1503
1504// Configures the fopen close-on-exec mode character, if any. This string will
1505// be appended to any mode string used by fstream for fopen/fdopen.
1506//
1507// Not all platforms support this, but it helps avoid fd-leaks on platforms that
1508// do.
1509#if defined(__BIONIC__)
1510# define _LIBCPP_FOPEN_CLOEXEC_MODE "e"
1511#else
1512# define _LIBCPP_FOPEN_CLOEXEC_MODE
1513#endif
1514
1515#endif // __cplusplus
1516
1517#endif // _LIBCPP_CONFIG
1518