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- //
- // Copyright 2017 The Abseil Authors.
- //
- // Licensed under the Apache License, Version 2.0 (the "License");
- // you may not use this file except in compliance with the License.
- // You may obtain a copy of the License at
- //
- // https://www.apache.org/licenses/LICENSE-2.0
- //
- // Unless required by applicable law or agreed to in writing, software
- // distributed under the License is distributed on an "AS IS" BASIS,
- // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- // See the License for the specific language governing permissions and
- // limitations under the License.
- //
- // -----------------------------------------------------------------------------
- // File: config.h
- // -----------------------------------------------------------------------------
- //
- // This header file defines a set of macros for checking the presence of
- // important compiler and platform features. Such macros can be used to
- // produce portable code by parameterizing compilation based on the presence or
- // lack of a given feature.
- //
- // We define a "feature" as some interface we wish to program to: for example,
- // a library function or system call. A value of `1` indicates support for
- // that feature; any other value indicates the feature support is undefined.
- //
- // Example:
- //
- // Suppose a programmer wants to write a program that uses the 'mmap()' system
- // call. The Abseil macro for that feature (`ABSL_HAVE_MMAP`) allows you to
- // selectively include the `mmap.h` header and bracket code using that feature
- // in the macro:
- //
- // #include "absl/base/config.h"
- //
- // #ifdef ABSL_HAVE_MMAP
- // #include "sys/mman.h"
- // #endif //ABSL_HAVE_MMAP
- //
- // ...
- // #ifdef ABSL_HAVE_MMAP
- // void *ptr = mmap(...);
- // ...
- // #endif // ABSL_HAVE_MMAP
- #ifndef ABSL_BASE_CONFIG_H_
- #define ABSL_BASE_CONFIG_H_
- // Included for the __GLIBC__ macro (or similar macros on other systems).
- #include <limits.h>
- #ifdef __cplusplus
- // Included for __GLIBCXX__, _LIBCPP_VERSION
- #include <cstddef>
- #endif // __cplusplus
- // ABSL_INTERNAL_CPLUSPLUS_LANG
- //
- // MSVC does not set the value of __cplusplus correctly, but instead uses
- // _MSVC_LANG as a stand-in.
- // https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros
- //
- // However, there are reports that MSVC even sets _MSVC_LANG incorrectly at
- // times, for example:
- // https://github.com/microsoft/vscode-cpptools/issues/1770
- // https://reviews.llvm.org/D70996
- //
- // For this reason, this symbol is considered INTERNAL and code outside of
- // Abseil must not use it.
- #if defined(_MSVC_LANG)
- #define ABSL_INTERNAL_CPLUSPLUS_LANG _MSVC_LANG
- #elif defined(__cplusplus)
- #define ABSL_INTERNAL_CPLUSPLUS_LANG __cplusplus
- #endif
- #if defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \
- ABSL_INTERNAL_CPLUSPLUS_LANG >= 202002L
- // Include library feature test macros.
- #include <version>
- #endif
- #if defined(__APPLE__)
- // Included for TARGET_OS_IPHONE, __IPHONE_OS_VERSION_MIN_REQUIRED,
- // __IPHONE_8_0.
- #include <Availability.h>
- #include <TargetConditionals.h>
- #endif
- #include "absl/base/options.h"
- #include "absl/base/policy_checks.h"
- // Abseil long-term support (LTS) releases will define
- // `ABSL_LTS_RELEASE_VERSION` to the integer representing the date string of the
- // LTS release version, and will define `ABSL_LTS_RELEASE_PATCH_LEVEL` to the
- // integer representing the patch-level for that release.
- //
- // For example, for LTS release version "20300401.2", this would give us
- // ABSL_LTS_RELEASE_VERSION == 20300401 && ABSL_LTS_RELEASE_PATCH_LEVEL == 2
- //
- // These symbols will not be defined in non-LTS code.
- //
- // Abseil recommends that clients live-at-head. Therefore, if you are using
- // these symbols to assert a minimum version requirement, we recommend you do it
- // as
- //
- // #if defined(ABSL_LTS_RELEASE_VERSION) && ABSL_LTS_RELEASE_VERSION < 20300401
- // #error Project foo requires Abseil LTS version >= 20300401
- // #endif
- //
- // The `defined(ABSL_LTS_RELEASE_VERSION)` part of the check excludes
- // live-at-head clients from the minimum version assertion.
- //
- // See https://abseil.io/about/releases for more information on Abseil release
- // management.
- //
- // LTS releases can be obtained from
- // https://github.com/abseil/abseil-cpp/releases.
- #define ABSL_LTS_RELEASE_VERSION 20240116
- #define ABSL_LTS_RELEASE_PATCH_LEVEL 2
- // Helper macro to convert a CPP variable to a string literal.
- #define ABSL_INTERNAL_DO_TOKEN_STR(x) #x
- #define ABSL_INTERNAL_TOKEN_STR(x) ABSL_INTERNAL_DO_TOKEN_STR(x)
- // -----------------------------------------------------------------------------
- // Abseil namespace annotations
- // -----------------------------------------------------------------------------
- // ABSL_NAMESPACE_BEGIN/ABSL_NAMESPACE_END
- //
- // An annotation placed at the beginning/end of each `namespace absl` scope.
- // This is used to inject an inline namespace.
- //
- // The proper way to write Abseil code in the `absl` namespace is:
- //
- // namespace absl {
- // ABSL_NAMESPACE_BEGIN
- //
- // void Foo(); // absl::Foo().
- //
- // ABSL_NAMESPACE_END
- // } // namespace absl
- //
- // Users of Abseil should not use these macros, because users of Abseil should
- // not write `namespace absl {` in their own code for any reason. (Abseil does
- // not support forward declarations of its own types, nor does it support
- // user-provided specialization of Abseil templates. Code that violates these
- // rules may be broken without warning.)
- #if !defined(ABSL_OPTION_USE_INLINE_NAMESPACE) || \
- !defined(ABSL_OPTION_INLINE_NAMESPACE_NAME)
- #error options.h is misconfigured.
- #endif
- // Check that ABSL_OPTION_INLINE_NAMESPACE_NAME is neither "head" nor ""
- #if defined(__cplusplus) && ABSL_OPTION_USE_INLINE_NAMESPACE == 1
- #define ABSL_INTERNAL_INLINE_NAMESPACE_STR \
- ABSL_INTERNAL_TOKEN_STR(ABSL_OPTION_INLINE_NAMESPACE_NAME)
- static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != '\0',
- "options.h misconfigured: ABSL_OPTION_INLINE_NAMESPACE_NAME must "
- "not be empty.");
- static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' ||
- ABSL_INTERNAL_INLINE_NAMESPACE_STR[1] != 'e' ||
- ABSL_INTERNAL_INLINE_NAMESPACE_STR[2] != 'a' ||
- ABSL_INTERNAL_INLINE_NAMESPACE_STR[3] != 'd' ||
- ABSL_INTERNAL_INLINE_NAMESPACE_STR[4] != '\0',
- "options.h misconfigured: ABSL_OPTION_INLINE_NAMESPACE_NAME must "
- "be changed to a new, unique identifier name.");
- #endif
- #if ABSL_OPTION_USE_INLINE_NAMESPACE == 0
- #define ABSL_NAMESPACE_BEGIN
- #define ABSL_NAMESPACE_END
- #define ABSL_INTERNAL_C_SYMBOL(x) x
- #elif ABSL_OPTION_USE_INLINE_NAMESPACE == 1
- #define ABSL_NAMESPACE_BEGIN \
- inline namespace ABSL_OPTION_INLINE_NAMESPACE_NAME {
- #define ABSL_NAMESPACE_END }
- #define ABSL_INTERNAL_C_SYMBOL_HELPER_2(x, v) x##_##v
- #define ABSL_INTERNAL_C_SYMBOL_HELPER_1(x, v) \
- ABSL_INTERNAL_C_SYMBOL_HELPER_2(x, v)
- #define ABSL_INTERNAL_C_SYMBOL(x) \
- ABSL_INTERNAL_C_SYMBOL_HELPER_1(x, ABSL_OPTION_INLINE_NAMESPACE_NAME)
- #else
- #error options.h is misconfigured.
- #endif
- // -----------------------------------------------------------------------------
- // Compiler Feature Checks
- // -----------------------------------------------------------------------------
- // ABSL_HAVE_BUILTIN()
- //
- // Checks whether the compiler supports a Clang Feature Checking Macro, and if
- // so, checks whether it supports the provided builtin function "x" where x
- // is one of the functions noted in
- // https://clang.llvm.org/docs/LanguageExtensions.html
- //
- // Note: Use this macro to avoid an extra level of #ifdef __has_builtin check.
- // http://releases.llvm.org/3.3/tools/clang/docs/LanguageExtensions.html
- #ifdef __has_builtin
- #define ABSL_HAVE_BUILTIN(x) __has_builtin(x)
- #else
- #define ABSL_HAVE_BUILTIN(x) 0
- #endif
- #ifdef __has_feature
- #define ABSL_HAVE_FEATURE(f) __has_feature(f)
- #else
- #define ABSL_HAVE_FEATURE(f) 0
- #endif
- // Portable check for GCC minimum version:
- // https://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html
- #if defined(__GNUC__) && defined(__GNUC_MINOR__)
- #define ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(x, y) \
- (__GNUC__ > (x) || __GNUC__ == (x) && __GNUC_MINOR__ >= (y))
- #else
- #define ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(x, y) 0
- #endif
- #if defined(__clang__) && defined(__clang_major__) && defined(__clang_minor__)
- #define ABSL_INTERNAL_HAVE_MIN_CLANG_VERSION(x, y) \
- (__clang_major__ > (x) || __clang_major__ == (x) && __clang_minor__ >= (y))
- #else
- #define ABSL_INTERNAL_HAVE_MIN_CLANG_VERSION(x, y) 0
- #endif
- // ABSL_HAVE_TLS is defined to 1 when __thread should be supported.
- // We assume __thread is supported on Linux or Asylo when compiled with Clang or
- // compiled against libstdc++ with _GLIBCXX_HAVE_TLS defined.
- #ifdef ABSL_HAVE_TLS
- #error ABSL_HAVE_TLS cannot be directly set
- #elif (defined(__linux__) || defined(__ASYLO__)) && \
- (defined(__clang__) || defined(_GLIBCXX_HAVE_TLS))
- #define ABSL_HAVE_TLS 1
- #endif
- // ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE
- //
- // Checks whether `std::is_trivially_destructible<T>` is supported.
- #ifdef ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE
- #error ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE cannot be directly set
- #define ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE 1
- #endif
- // ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE
- //
- // Checks whether `std::is_trivially_default_constructible<T>` and
- // `std::is_trivially_copy_constructible<T>` are supported.
- #ifdef ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE
- #error ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE cannot be directly set
- #else
- #define ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE 1
- #endif
- // ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE
- //
- // Checks whether `std::is_trivially_copy_assignable<T>` is supported.
- #ifdef ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE
- #error ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE cannot be directly set
- #else
- #define ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE 1
- #endif
- // ABSL_HAVE_STD_IS_TRIVIALLY_COPYABLE
- //
- // Checks whether `std::is_trivially_copyable<T>` is supported.
- #ifdef ABSL_HAVE_STD_IS_TRIVIALLY_COPYABLE
- #error ABSL_HAVE_STD_IS_TRIVIALLY_COPYABLE cannot be directly set
- #define ABSL_HAVE_STD_IS_TRIVIALLY_COPYABLE 1
- #endif
- // ABSL_HAVE_THREAD_LOCAL
- //
- // Checks whether C++11's `thread_local` storage duration specifier is
- // supported.
- #ifdef ABSL_HAVE_THREAD_LOCAL
- #error ABSL_HAVE_THREAD_LOCAL cannot be directly set
- #elif defined(__APPLE__)
- // Notes:
- // * Xcode's clang did not support `thread_local` until version 8, and
- // even then not for all iOS < 9.0.
- // * Xcode 9.3 started disallowing `thread_local` for 32-bit iOS simulator
- // targeting iOS 9.x.
- // * Xcode 10 moves the deployment target check for iOS < 9.0 to link time
- // making ABSL_HAVE_FEATURE unreliable there.
- //
- #if ABSL_HAVE_FEATURE(cxx_thread_local) && \
- !(TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_9_0)
- #define ABSL_HAVE_THREAD_LOCAL 1
- #endif
- #else // !defined(__APPLE__)
- #define ABSL_HAVE_THREAD_LOCAL 1
- #endif
- // There are platforms for which TLS should not be used even though the compiler
- // makes it seem like it's supported (Android NDK < r12b for example).
- // This is primarily because of linker problems and toolchain misconfiguration:
- // Abseil does not intend to support this indefinitely. Currently, the newest
- // toolchain that we intend to support that requires this behavior is the
- // r11 NDK - allowing for a 5 year support window on that means this option
- // is likely to be removed around June of 2021.
- // TLS isn't supported until NDK r12b per
- // https://developer.android.com/ndk/downloads/revision_history.html
- // Since NDK r16, `__NDK_MAJOR__` and `__NDK_MINOR__` are defined in
- // <android/ndk-version.h>. For NDK < r16, users should define these macros,
- // e.g. `-D__NDK_MAJOR__=11 -D__NKD_MINOR__=0` for NDK r11.
- #if defined(__ANDROID__) && defined(__clang__)
- #if __has_include(<android/ndk-version.h>)
- #include <android/ndk-version.h>
- #endif // __has_include(<android/ndk-version.h>)
- #if defined(__ANDROID__) && defined(__clang__) && defined(__NDK_MAJOR__) && \
- defined(__NDK_MINOR__) && \
- ((__NDK_MAJOR__ < 12) || ((__NDK_MAJOR__ == 12) && (__NDK_MINOR__ < 1)))
- #undef ABSL_HAVE_TLS
- #undef ABSL_HAVE_THREAD_LOCAL
- #endif
- #endif // defined(__ANDROID__) && defined(__clang__)
- // ABSL_HAVE_INTRINSIC_INT128
- //
- // Checks whether the __int128 compiler extension for a 128-bit integral type is
- // supported.
- //
- // Note: __SIZEOF_INT128__ is defined by Clang and GCC when __int128 is
- // supported, but we avoid using it in certain cases:
- // * On Clang:
- // * Building using Clang for Windows, where the Clang runtime library has
- // 128-bit support only on LP64 architectures, but Windows is LLP64.
- // * On Nvidia's nvcc:
- // * nvcc also defines __GNUC__ and __SIZEOF_INT128__, but not all versions
- // actually support __int128.
- #ifdef ABSL_HAVE_INTRINSIC_INT128
- #error ABSL_HAVE_INTRINSIC_INT128 cannot be directly set
- #elif defined(__SIZEOF_INT128__)
- #if (defined(__clang__) && !defined(_WIN32)) || \
- (defined(__CUDACC__) && __CUDACC_VER_MAJOR__ >= 9) || \
- (defined(__GNUC__) && !defined(__clang__) && !defined(__CUDACC__))
- #define ABSL_HAVE_INTRINSIC_INT128 1
- #elif defined(__CUDACC__)
- // __CUDACC_VER__ is a full version number before CUDA 9, and is defined to a
- // string explaining that it has been removed starting with CUDA 9. We use
- // nested #ifs because there is no short-circuiting in the preprocessor.
- // NOTE: `__CUDACC__` could be undefined while `__CUDACC_VER__` is defined.
- #if __CUDACC_VER__ >= 70000
- #define ABSL_HAVE_INTRINSIC_INT128 1
- #endif // __CUDACC_VER__ >= 70000
- #endif // defined(__CUDACC__)
- #endif // ABSL_HAVE_INTRINSIC_INT128
- // ABSL_HAVE_EXCEPTIONS
- //
- // Checks whether the compiler both supports and enables exceptions. Many
- // compilers support a "no exceptions" mode that disables exceptions.
- //
- // Generally, when ABSL_HAVE_EXCEPTIONS is not defined:
- //
- // * Code using `throw` and `try` may not compile.
- // * The `noexcept` specifier will still compile and behave as normal.
- // * The `noexcept` operator may still return `false`.
- //
- // For further details, consult the compiler's documentation.
- #ifdef ABSL_HAVE_EXCEPTIONS
- #error ABSL_HAVE_EXCEPTIONS cannot be directly set.
- #elif ABSL_INTERNAL_HAVE_MIN_CLANG_VERSION(3, 6)
- // Clang >= 3.6
- #if ABSL_HAVE_FEATURE(cxx_exceptions)
- #define ABSL_HAVE_EXCEPTIONS 1
- #endif // ABSL_HAVE_FEATURE(cxx_exceptions)
- #elif defined(__clang__)
- // Clang < 3.6
- // http://releases.llvm.org/3.6.0/tools/clang/docs/ReleaseNotes.html#the-exceptions-macro
- #if defined(__EXCEPTIONS) && ABSL_HAVE_FEATURE(cxx_exceptions)
- #define ABSL_HAVE_EXCEPTIONS 1
- #endif // defined(__EXCEPTIONS) && ABSL_HAVE_FEATURE(cxx_exceptions)
- // Handle remaining special cases and default to exceptions being supported.
- #elif !(defined(__GNUC__) && (__GNUC__ < 5) && !defined(__EXCEPTIONS)) && \
- !(ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(5, 0) && \
- !defined(__cpp_exceptions)) && \
- !(defined(_MSC_VER) && !defined(_CPPUNWIND))
- #define ABSL_HAVE_EXCEPTIONS 1
- #endif
- // -----------------------------------------------------------------------------
- // Platform Feature Checks
- // -----------------------------------------------------------------------------
- // Currently supported operating systems and associated preprocessor
- // symbols:
- //
- // Linux and Linux-derived __linux__
- // Android __ANDROID__ (implies __linux__)
- // Linux (non-Android) __linux__ && !__ANDROID__
- // Darwin (macOS and iOS) __APPLE__
- // Akaros (http://akaros.org) __ros__
- // Windows _WIN32
- // NaCL __native_client__
- // AsmJS __asmjs__
- // WebAssembly (Emscripten) __EMSCRIPTEN__
- // Fuchsia __Fuchsia__
- //
- // Note that since Android defines both __ANDROID__ and __linux__, one
- // may probe for either Linux or Android by simply testing for __linux__.
- // ABSL_HAVE_MMAP
- //
- // Checks whether the platform has an mmap(2) implementation as defined in
- // POSIX.1-2001.
- #ifdef ABSL_HAVE_MMAP
- #error ABSL_HAVE_MMAP cannot be directly set
- #elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || \
- defined(_AIX) || defined(__ros__) || defined(__native_client__) || \
- defined(__asmjs__) || defined(__EMSCRIPTEN__) || defined(__Fuchsia__) || \
- defined(__sun) || defined(__ASYLO__) || defined(__myriad2__) || \
- defined(__HAIKU__) || defined(__OpenBSD__) || defined(__NetBSD__) || \
- defined(__QNX__) || defined(__VXWORKS__) || defined(__hexagon__)
- #define ABSL_HAVE_MMAP 1
- #endif
- // ABSL_HAVE_PTHREAD_GETSCHEDPARAM
- //
- // Checks whether the platform implements the pthread_(get|set)schedparam(3)
- // functions as defined in POSIX.1-2001.
- #ifdef ABSL_HAVE_PTHREAD_GETSCHEDPARAM
- #error ABSL_HAVE_PTHREAD_GETSCHEDPARAM cannot be directly set
- #elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || \
- defined(_AIX) || defined(__ros__) || defined(__OpenBSD__) || \
- defined(__NetBSD__) || defined(__VXWORKS__)
- #define ABSL_HAVE_PTHREAD_GETSCHEDPARAM 1
- #endif
- // ABSL_HAVE_SCHED_GETCPU
- //
- // Checks whether sched_getcpu is available.
- #ifdef ABSL_HAVE_SCHED_GETCPU
- #error ABSL_HAVE_SCHED_GETCPU cannot be directly set
- #elif defined(__linux__)
- #define ABSL_HAVE_SCHED_GETCPU 1
- #endif
- // ABSL_HAVE_SCHED_YIELD
- //
- // Checks whether the platform implements sched_yield(2) as defined in
- // POSIX.1-2001.
- #ifdef ABSL_HAVE_SCHED_YIELD
- #error ABSL_HAVE_SCHED_YIELD cannot be directly set
- #elif defined(__linux__) || defined(__ros__) || defined(__native_client__) || \
- defined(__VXWORKS__)
- #define ABSL_HAVE_SCHED_YIELD 1
- #endif
- // ABSL_HAVE_SEMAPHORE_H
- //
- // Checks whether the platform supports the <semaphore.h> header and sem_init(3)
- // family of functions as standardized in POSIX.1-2001.
- //
- // Note: While Apple provides <semaphore.h> for both iOS and macOS, it is
- // explicitly deprecated and will cause build failures if enabled for those
- // platforms. We side-step the issue by not defining it here for Apple
- // platforms.
- #ifdef ABSL_HAVE_SEMAPHORE_H
- #error ABSL_HAVE_SEMAPHORE_H cannot be directly set
- #elif defined(__linux__) || defined(__ros__) || defined(__VXWORKS__)
- #define ABSL_HAVE_SEMAPHORE_H 1
- #endif
- // ABSL_HAVE_ALARM
- //
- // Checks whether the platform supports the <signal.h> header and alarm(2)
- // function as standardized in POSIX.1-2001.
- #ifdef ABSL_HAVE_ALARM
- #error ABSL_HAVE_ALARM cannot be directly set
- #elif defined(__GOOGLE_GRTE_VERSION__)
- // feature tests for Google's GRTE
- #define ABSL_HAVE_ALARM 1
- #elif defined(__GLIBC__)
- // feature test for glibc
- #define ABSL_HAVE_ALARM 1
- #elif defined(_MSC_VER)
- // feature tests for Microsoft's library
- #elif defined(__MINGW32__)
- // mingw32 doesn't provide alarm(2):
- // https://osdn.net/projects/mingw/scm/git/mingw-org-wsl/blobs/5.2-trunk/mingwrt/include/unistd.h
- // mingw-w64 provides a no-op implementation:
- // https://sourceforge.net/p/mingw-w64/mingw-w64/ci/master/tree/mingw-w64-crt/misc/alarm.c
- #elif defined(__EMSCRIPTEN__)
- // emscripten doesn't support signals
- #elif defined(__wasi__)
- // WASI doesn't support signals
- #elif defined(__Fuchsia__)
- // Signals don't exist on fuchsia.
- #elif defined(__native_client__)
- // Signals don't exist on hexagon/QuRT
- #elif defined(__hexagon__)
- #else
- // other standard libraries
- #define ABSL_HAVE_ALARM 1
- #endif
- // ABSL_IS_LITTLE_ENDIAN
- // ABSL_IS_BIG_ENDIAN
- //
- // Checks the endianness of the platform.
- //
- // Notes: uses the built in endian macros provided by GCC (since 4.6) and
- // Clang (since 3.2); see
- // https://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html.
- // Otherwise, if _WIN32, assume little endian. Otherwise, bail with an error.
- #if defined(ABSL_IS_BIG_ENDIAN)
- #error "ABSL_IS_BIG_ENDIAN cannot be directly set."
- #endif
- #if defined(ABSL_IS_LITTLE_ENDIAN)
- #error "ABSL_IS_LITTLE_ENDIAN cannot be directly set."
- #endif
- #if (defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && \
- __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
- #define ABSL_IS_LITTLE_ENDIAN 1
- #elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \
- __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
- #define ABSL_IS_BIG_ENDIAN 1
- #elif defined(_WIN32)
- #define ABSL_IS_LITTLE_ENDIAN 1
- #else
- #error "absl endian detection needs to be set up for your compiler"
- #endif
- // macOS < 10.13 and iOS < 12 don't support <any>, <optional>, or <variant>
- // because the libc++ shared library shipped on the system doesn't have the
- // requisite exported symbols. See
- // https://github.com/abseil/abseil-cpp/issues/207 and
- // https://developer.apple.com/documentation/xcode_release_notes/xcode_10_release_notes
- //
- // libc++ spells out the availability requirements in the file
- // llvm-project/libcxx/include/__config via the #define
- // _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS. The set of versions has been
- // modified a few times, via
- // https://github.com/llvm/llvm-project/commit/7fb40e1569dd66292b647f4501b85517e9247953
- // and
- // https://github.com/llvm/llvm-project/commit/0bc451e7e137c4ccadcd3377250874f641ca514a
- // The second has the actually correct versions, thus, is what we copy here.
- #if defined(__APPLE__) && \
- ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \
- __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101300) || \
- (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && \
- __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 120000) || \
- (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && \
- __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 50000) || \
- (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && \
- __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 120000))
- #define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE 1
- #else
- #define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE 0
- #endif
- // ABSL_HAVE_STD_ANY
- //
- // Checks whether C++17 std::any is available.
- #ifdef ABSL_HAVE_STD_ANY
- #error "ABSL_HAVE_STD_ANY cannot be directly set."
- #elif defined(__cpp_lib_any) && __cpp_lib_any >= 201606L
- #define ABSL_HAVE_STD_ANY 1
- #elif defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \
- ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L && \
- !ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE
- #define ABSL_HAVE_STD_ANY 1
- #endif
- // ABSL_HAVE_STD_OPTIONAL
- //
- // Checks whether C++17 std::optional is available.
- #ifdef ABSL_HAVE_STD_OPTIONAL
- #error "ABSL_HAVE_STD_OPTIONAL cannot be directly set."
- #elif defined(__cpp_lib_optional) && __cpp_lib_optional >= 202106L
- #define ABSL_HAVE_STD_OPTIONAL 1
- #elif defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \
- ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L && \
- !ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE
- #define ABSL_HAVE_STD_OPTIONAL 1
- #endif
- // ABSL_HAVE_STD_VARIANT
- //
- // Checks whether C++17 std::variant is available.
- #ifdef ABSL_HAVE_STD_VARIANT
- #error "ABSL_HAVE_STD_VARIANT cannot be directly set."
- #elif defined(__cpp_lib_variant) && __cpp_lib_variant >= 201606L
- #define ABSL_HAVE_STD_VARIANT 1
- #elif defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \
- ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L && \
- !ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE
- #define ABSL_HAVE_STD_VARIANT 1
- #endif
- // ABSL_HAVE_STD_STRING_VIEW
- //
- // Checks whether C++17 std::string_view is available.
- #ifdef ABSL_HAVE_STD_STRING_VIEW
- #error "ABSL_HAVE_STD_STRING_VIEW cannot be directly set."
- #elif defined(__cpp_lib_string_view) && __cpp_lib_string_view >= 201606L
- #define ABSL_HAVE_STD_STRING_VIEW 1
- #elif defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \
- ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L
- #define ABSL_HAVE_STD_STRING_VIEW 1
- #endif
- // ABSL_HAVE_STD_ORDERING
- //
- // Checks whether C++20 std::{partial,weak,strong}_ordering are available.
- //
- // __cpp_lib_three_way_comparison is missing on libc++
- // (https://github.com/llvm/llvm-project/issues/73953) so treat it as defined
- // when building in C++20 mode.
- #ifdef ABSL_HAVE_STD_ORDERING
- #error "ABSL_HAVE_STD_ORDERING cannot be directly set."
- #elif (defined(__cpp_lib_three_way_comparison) && \
- __cpp_lib_three_way_comparison >= 201907L) || \
- (defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \
- ABSL_INTERNAL_CPLUSPLUS_LANG >= 202002L)
- #define ABSL_HAVE_STD_ORDERING 1
- #endif
- // ABSL_USES_STD_ANY
- //
- // Indicates whether absl::any is an alias for std::any.
- #if !defined(ABSL_OPTION_USE_STD_ANY)
- #error options.h is misconfigured.
- #elif ABSL_OPTION_USE_STD_ANY == 0 || \
- (ABSL_OPTION_USE_STD_ANY == 2 && !defined(ABSL_HAVE_STD_ANY))
- #undef ABSL_USES_STD_ANY
- #elif ABSL_OPTION_USE_STD_ANY == 1 || \
- (ABSL_OPTION_USE_STD_ANY == 2 && defined(ABSL_HAVE_STD_ANY))
- #define ABSL_USES_STD_ANY 1
- #else
- #error options.h is misconfigured.
- #endif
- // ABSL_USES_STD_OPTIONAL
- //
- // Indicates whether absl::optional is an alias for std::optional.
- #if !defined(ABSL_OPTION_USE_STD_OPTIONAL)
- #error options.h is misconfigured.
- #elif ABSL_OPTION_USE_STD_OPTIONAL == 0 || \
- (ABSL_OPTION_USE_STD_OPTIONAL == 2 && !defined(ABSL_HAVE_STD_OPTIONAL))
- #undef ABSL_USES_STD_OPTIONAL
- #elif ABSL_OPTION_USE_STD_OPTIONAL == 1 || \
- (ABSL_OPTION_USE_STD_OPTIONAL == 2 && defined(ABSL_HAVE_STD_OPTIONAL))
- #define ABSL_USES_STD_OPTIONAL 1
- #else
- #error options.h is misconfigured.
- #endif
- // ABSL_USES_STD_VARIANT
- //
- // Indicates whether absl::variant is an alias for std::variant.
- #if !defined(ABSL_OPTION_USE_STD_VARIANT)
- #error options.h is misconfigured.
- #elif ABSL_OPTION_USE_STD_VARIANT == 0 || \
- (ABSL_OPTION_USE_STD_VARIANT == 2 && !defined(ABSL_HAVE_STD_VARIANT))
- #undef ABSL_USES_STD_VARIANT
- #elif ABSL_OPTION_USE_STD_VARIANT == 1 || \
- (ABSL_OPTION_USE_STD_VARIANT == 2 && defined(ABSL_HAVE_STD_VARIANT))
- #define ABSL_USES_STD_VARIANT 1
- #else
- #error options.h is misconfigured.
- #endif
- // ABSL_USES_STD_STRING_VIEW
- //
- // Indicates whether absl::string_view is an alias for std::string_view.
- #if !defined(ABSL_OPTION_USE_STD_STRING_VIEW)
- #error options.h is misconfigured.
- #elif ABSL_OPTION_USE_STD_STRING_VIEW == 0 || \
- (ABSL_OPTION_USE_STD_STRING_VIEW == 2 && \
- !defined(ABSL_HAVE_STD_STRING_VIEW))
- #undef ABSL_USES_STD_STRING_VIEW
- #elif ABSL_OPTION_USE_STD_STRING_VIEW == 1 || \
- (ABSL_OPTION_USE_STD_STRING_VIEW == 2 && \
- defined(ABSL_HAVE_STD_STRING_VIEW))
- #define ABSL_USES_STD_STRING_VIEW 1
- #else
- #error options.h is misconfigured.
- #endif
- // ABSL_USES_STD_ORDERING
- //
- // Indicates whether absl::{partial,weak,strong}_ordering are aliases for the
- // std:: ordering types.
- #if !defined(ABSL_OPTION_USE_STD_ORDERING)
- #error options.h is misconfigured.
- #elif ABSL_OPTION_USE_STD_ORDERING == 0 || \
- (ABSL_OPTION_USE_STD_ORDERING == 2 && !defined(ABSL_HAVE_STD_ORDERING))
- #undef ABSL_USES_STD_ORDERING
- #elif ABSL_OPTION_USE_STD_ORDERING == 1 || \
- (ABSL_OPTION_USE_STD_ORDERING == 2 && defined(ABSL_HAVE_STD_ORDERING))
- #define ABSL_USES_STD_ORDERING 1
- #else
- #error options.h is misconfigured.
- #endif
- // In debug mode, MSVC 2017's std::variant throws a EXCEPTION_ACCESS_VIOLATION
- // SEH exception from emplace for variant<SomeStruct> when constructing the
- // struct can throw. This defeats some of variant_test and
- // variant_exception_safety_test.
- #if defined(_MSC_VER) && _MSC_VER >= 1700 && defined(_DEBUG)
- #define ABSL_INTERNAL_MSVC_2017_DBG_MODE
- #endif
- // ABSL_INTERNAL_MANGLED_NS
- // ABSL_INTERNAL_MANGLED_BACKREFERENCE
- //
- // Internal macros for building up mangled names in our internal fork of CCTZ.
- // This implementation detail is only needed and provided for the MSVC build.
- //
- // These macros both expand to string literals. ABSL_INTERNAL_MANGLED_NS is
- // the mangled spelling of the `absl` namespace, and
- // ABSL_INTERNAL_MANGLED_BACKREFERENCE is a back-reference integer representing
- // the proper count to skip past the CCTZ fork namespace names. (This number
- // is one larger when there is an inline namespace name to skip.)
- #if defined(_MSC_VER)
- #if ABSL_OPTION_USE_INLINE_NAMESPACE == 0
- #define ABSL_INTERNAL_MANGLED_NS "absl"
- #define ABSL_INTERNAL_MANGLED_BACKREFERENCE "5"
- #else
- #define ABSL_INTERNAL_MANGLED_NS \
- ABSL_INTERNAL_TOKEN_STR(ABSL_OPTION_INLINE_NAMESPACE_NAME) "@absl"
- #define ABSL_INTERNAL_MANGLED_BACKREFERENCE "6"
- #endif
- #endif
- // ABSL_DLL
- //
- // When building Abseil as a DLL, this macro expands to `__declspec(dllexport)`
- // so we can annotate symbols appropriately as being exported. When used in
- // headers consuming a DLL, this macro expands to `__declspec(dllimport)` so
- // that consumers know the symbol is defined inside the DLL. In all other cases,
- // the macro expands to nothing.
- #if defined(_MSC_VER)
- #if defined(ABSL_BUILD_DLL)
- #define ABSL_DLL __declspec(dllexport)
- #elif defined(ABSL_CONSUME_DLL)
- #define ABSL_DLL __declspec(dllimport)
- #else
- #define ABSL_DLL
- #endif
- #else
- #define ABSL_DLL
- #endif // defined(_MSC_VER)
- #if defined(_MSC_VER)
- #if defined(ABSL_BUILD_TEST_DLL)
- #define ABSL_TEST_DLL __declspec(dllexport)
- #elif defined(ABSL_CONSUME_TEST_DLL)
- #define ABSL_TEST_DLL __declspec(dllimport)
- #else
- #define ABSL_TEST_DLL
- #endif
- #else
- #define ABSL_TEST_DLL
- #endif // defined(_MSC_VER)
- // ABSL_HAVE_MEMORY_SANITIZER
- //
- // MemorySanitizer (MSan) is a detector of uninitialized reads. It consists of
- // a compiler instrumentation module and a run-time library.
- #ifdef ABSL_HAVE_MEMORY_SANITIZER
- #error "ABSL_HAVE_MEMORY_SANITIZER cannot be directly set."
- #elif !defined(__native_client__) && ABSL_HAVE_FEATURE(memory_sanitizer)
- #define ABSL_HAVE_MEMORY_SANITIZER 1
- #endif
- // ABSL_HAVE_THREAD_SANITIZER
- //
- // ThreadSanitizer (TSan) is a fast data race detector.
- #ifdef ABSL_HAVE_THREAD_SANITIZER
- #error "ABSL_HAVE_THREAD_SANITIZER cannot be directly set."
- #elif defined(__SANITIZE_THREAD__)
- #define ABSL_HAVE_THREAD_SANITIZER 1
- #elif ABSL_HAVE_FEATURE(thread_sanitizer)
- #define ABSL_HAVE_THREAD_SANITIZER 1
- #endif
- // ABSL_HAVE_ADDRESS_SANITIZER
- //
- // AddressSanitizer (ASan) is a fast memory error detector.
- #ifdef ABSL_HAVE_ADDRESS_SANITIZER
- #error "ABSL_HAVE_ADDRESS_SANITIZER cannot be directly set."
- #elif defined(__SANITIZE_ADDRESS__)
- #define ABSL_HAVE_ADDRESS_SANITIZER 1
- #elif ABSL_HAVE_FEATURE(address_sanitizer)
- #define ABSL_HAVE_ADDRESS_SANITIZER 1
- #endif
- // ABSL_HAVE_HWADDRESS_SANITIZER
- //
- // Hardware-Assisted AddressSanitizer (or HWASAN) is even faster than asan
- // memory error detector which can use CPU features like ARM TBI, Intel LAM or
- // AMD UAI.
- #ifdef ABSL_HAVE_HWADDRESS_SANITIZER
- #error "ABSL_HAVE_HWADDRESS_SANITIZER cannot be directly set."
- #elif defined(__SANITIZE_HWADDRESS__)
- #define ABSL_HAVE_HWADDRESS_SANITIZER 1
- #elif ABSL_HAVE_FEATURE(hwaddress_sanitizer)
- #define ABSL_HAVE_HWADDRESS_SANITIZER 1
- #endif
- // ABSL_HAVE_DATAFLOW_SANITIZER
- //
- // Dataflow Sanitizer (or DFSAN) is a generalised dynamic data flow analysis.
- #ifdef ABSL_HAVE_DATAFLOW_SANITIZER
- #error "ABSL_HAVE_DATAFLOW_SANITIZER cannot be directly set."
- #elif defined(DATAFLOW_SANITIZER)
- // GCC provides no method for detecting the presence of the standalone
- // DataFlowSanitizer (-fsanitize=dataflow), so GCC users of -fsanitize=dataflow
- // should also use -DDATAFLOW_SANITIZER.
- #define ABSL_HAVE_DATAFLOW_SANITIZER 1
- #elif ABSL_HAVE_FEATURE(dataflow_sanitizer)
- #define ABSL_HAVE_DATAFLOW_SANITIZER 1
- #endif
- // ABSL_HAVE_LEAK_SANITIZER
- //
- // LeakSanitizer (or lsan) is a detector of memory leaks.
- // https://clang.llvm.org/docs/LeakSanitizer.html
- // https://github.com/google/sanitizers/wiki/AddressSanitizerLeakSanitizer
- //
- // The macro ABSL_HAVE_LEAK_SANITIZER can be used to detect at compile-time
- // whether the LeakSanitizer is potentially available. However, just because the
- // LeakSanitizer is available does not mean it is active. Use the
- // always-available run-time interface in //absl/debugging/leak_check.h for
- // interacting with LeakSanitizer.
- #ifdef ABSL_HAVE_LEAK_SANITIZER
- #error "ABSL_HAVE_LEAK_SANITIZER cannot be directly set."
- #elif defined(LEAK_SANITIZER)
- // GCC provides no method for detecting the presence of the standalone
- // LeakSanitizer (-fsanitize=leak), so GCC users of -fsanitize=leak should also
- // use -DLEAK_SANITIZER.
- #define ABSL_HAVE_LEAK_SANITIZER 1
- // Clang standalone LeakSanitizer (-fsanitize=leak)
- #elif ABSL_HAVE_FEATURE(leak_sanitizer)
- #define ABSL_HAVE_LEAK_SANITIZER 1
- #elif defined(ABSL_HAVE_ADDRESS_SANITIZER)
- // GCC or Clang using the LeakSanitizer integrated into AddressSanitizer.
- #define ABSL_HAVE_LEAK_SANITIZER 1
- #endif
- // ABSL_HAVE_CLASS_TEMPLATE_ARGUMENT_DEDUCTION
- //
- // Class template argument deduction is a language feature added in C++17.
- #ifdef ABSL_HAVE_CLASS_TEMPLATE_ARGUMENT_DEDUCTION
- #error "ABSL_HAVE_CLASS_TEMPLATE_ARGUMENT_DEDUCTION cannot be directly set."
- #elif defined(__cpp_deduction_guides)
- #define ABSL_HAVE_CLASS_TEMPLATE_ARGUMENT_DEDUCTION 1
- #endif
- // ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
- //
- // Prior to C++17, static constexpr variables defined in classes required a
- // separate definition outside of the class body, for example:
- //
- // class Foo {
- // static constexpr int kBar = 0;
- // };
- // constexpr int Foo::kBar;
- //
- // In C++17, these variables defined in classes are considered inline variables,
- // and the extra declaration is redundant. Since some compilers warn on the
- // extra declarations, ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL can be used
- // conditionally ignore them:
- //
- // #ifdef ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL
- // constexpr int Foo::kBar;
- // #endif
- #if defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \
- ABSL_INTERNAL_CPLUSPLUS_LANG < 201703L
- #define ABSL_INTERNAL_NEED_REDUNDANT_CONSTEXPR_DECL 1
- #endif
- // `ABSL_INTERNAL_HAS_RTTI` determines whether abseil is being compiled with
- // RTTI support.
- #ifdef ABSL_INTERNAL_HAS_RTTI
- #error ABSL_INTERNAL_HAS_RTTI cannot be directly set
- #elif ABSL_HAVE_FEATURE(cxx_rtti)
- #define ABSL_INTERNAL_HAS_RTTI 1
- #elif defined(__GNUC__) && defined(__GXX_RTTI)
- #define ABSL_INTERNAL_HAS_RTTI 1
- #elif defined(_MSC_VER) && defined(_CPPRTTI)
- #define ABSL_INTERNAL_HAS_RTTI 1
- #elif !defined(__GNUC__) && !defined(_MSC_VER)
- // Unknown compiler, default to RTTI
- #define ABSL_INTERNAL_HAS_RTTI 1
- #endif
- // `ABSL_INTERNAL_HAS_CXA_DEMANGLE` determines whether `abi::__cxa_demangle` is
- // available.
- #ifdef ABSL_INTERNAL_HAS_CXA_DEMANGLE
- #error ABSL_INTERNAL_HAS_CXA_DEMANGLE cannot be directly set
- #elif defined(OS_ANDROID) && (defined(__i386__) || defined(__x86_64__))
- #define ABSL_INTERNAL_HAS_CXA_DEMANGLE 0
- #elif defined(__GNUC__) && defined(__GNUC_MINOR__) && \
- (__GNUC__ >= 4 || (__GNUC__ >= 3 && __GNUC_MINOR__ >= 4)) && \
- !defined(__mips__)
- #define ABSL_INTERNAL_HAS_CXA_DEMANGLE 1
- #elif defined(__clang__) && !defined(_MSC_VER)
- #define ABSL_INTERNAL_HAS_CXA_DEMANGLE 1
- #endif
- // ABSL_INTERNAL_HAVE_SSE is used for compile-time detection of SSE support.
- // See https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html for an overview of
- // which architectures support the various x86 instruction sets.
- #ifdef ABSL_INTERNAL_HAVE_SSE
- #error ABSL_INTERNAL_HAVE_SSE cannot be directly set
- #elif defined(__SSE__)
- #define ABSL_INTERNAL_HAVE_SSE 1
- #elif (defined(_M_X64) || (defined(_M_IX86_FP) && _M_IX86_FP >= 1)) && \
- !defined(_M_ARM64EC)
- // MSVC only defines _M_IX86_FP for x86 32-bit code, and _M_IX86_FP >= 1
- // indicates that at least SSE was targeted with the /arch:SSE option.
- // All x86-64 processors support SSE, so support can be assumed.
- // https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros
- #define ABSL_INTERNAL_HAVE_SSE 1
- #endif
- // ABSL_INTERNAL_HAVE_SSE2 is used for compile-time detection of SSE2 support.
- // See https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html for an overview of
- // which architectures support the various x86 instruction sets.
- #ifdef ABSL_INTERNAL_HAVE_SSE2
- #error ABSL_INTERNAL_HAVE_SSE2 cannot be directly set
- #elif defined(__SSE2__)
- #define ABSL_INTERNAL_HAVE_SSE2 1
- #elif (defined(_M_X64) || (defined(_M_IX86_FP) && _M_IX86_FP >= 2)) && \
- !defined(_M_ARM64EC)
- // MSVC only defines _M_IX86_FP for x86 32-bit code, and _M_IX86_FP >= 2
- // indicates that at least SSE2 was targeted with the /arch:SSE2 option.
- // All x86-64 processors support SSE2, so support can be assumed.
- // https://docs.microsoft.com/en-us/cpp/preprocessor/predefined-macros
- #define ABSL_INTERNAL_HAVE_SSE2 1
- #endif
- // ABSL_INTERNAL_HAVE_SSSE3 is used for compile-time detection of SSSE3 support.
- // See https://gcc.gnu.org/onlinedocs/gcc/x86-Options.html for an overview of
- // which architectures support the various x86 instruction sets.
- //
- // MSVC does not have a mode that targets SSSE3 at compile-time. To use SSSE3
- // with MSVC requires either assuming that the code will only every run on CPUs
- // that support SSSE3, otherwise __cpuid() can be used to detect support at
- // runtime and fallback to a non-SSSE3 implementation when SSSE3 is unsupported
- // by the CPU.
- #ifdef ABSL_INTERNAL_HAVE_SSSE3
- #error ABSL_INTERNAL_HAVE_SSSE3 cannot be directly set
- #elif defined(__SSSE3__)
- #define ABSL_INTERNAL_HAVE_SSSE3 1
- #endif
- // ABSL_INTERNAL_HAVE_ARM_NEON is used for compile-time detection of NEON (ARM
- // SIMD).
- //
- // If __CUDA_ARCH__ is defined, then we are compiling CUDA code in device mode.
- // In device mode, NEON intrinsics are not available, regardless of host
- // platform.
- // https://llvm.org/docs/CompileCudaWithLLVM.html#detecting-clang-vs-nvcc-from-code
- #ifdef ABSL_INTERNAL_HAVE_ARM_NEON
- #error ABSL_INTERNAL_HAVE_ARM_NEON cannot be directly set
- #elif defined(__ARM_NEON) && !defined(__CUDA_ARCH__)
- #define ABSL_INTERNAL_HAVE_ARM_NEON 1
- #endif
- // ABSL_HAVE_CONSTANT_EVALUATED is used for compile-time detection of
- // constant evaluation support through `absl::is_constant_evaluated`.
- #ifdef ABSL_HAVE_CONSTANT_EVALUATED
- #error ABSL_HAVE_CONSTANT_EVALUATED cannot be directly set
- #endif
- #ifdef __cpp_lib_is_constant_evaluated
- #define ABSL_HAVE_CONSTANT_EVALUATED 1
- #elif ABSL_HAVE_BUILTIN(__builtin_is_constant_evaluated)
- #define ABSL_HAVE_CONSTANT_EVALUATED 1
- #endif
- // ABSL_INTERNAL_EMSCRIPTEN_VERSION combines Emscripten's three version macros
- // into an integer that can be compared against.
- #ifdef ABSL_INTERNAL_EMSCRIPTEN_VERSION
- #error ABSL_INTERNAL_EMSCRIPTEN_VERSION cannot be directly set
- #endif
- #ifdef __EMSCRIPTEN__
- #error #include <emscripten/version.h>
- #ifdef __EMSCRIPTEN_major__
- #if __EMSCRIPTEN_minor__ >= 1000
- #error __EMSCRIPTEN_minor__ is too big to fit in ABSL_INTERNAL_EMSCRIPTEN_VERSION
- #endif
- #if __EMSCRIPTEN_tiny__ >= 1000
- #error __EMSCRIPTEN_tiny__ is too big to fit in ABSL_INTERNAL_EMSCRIPTEN_VERSION
- #endif
- #define ABSL_INTERNAL_EMSCRIPTEN_VERSION \
- ((__EMSCRIPTEN_major__) * 1000000 + (__EMSCRIPTEN_minor__) * 1000 + \
- (__EMSCRIPTEN_tiny__))
- #endif
- #endif
- #endif // ABSL_BASE_CONFIG_H_
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