// // 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 … #elif defined(__cplusplus) #define ABSL_INTERNAL_CPLUSPLUS_LANG … #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. #undef ABSL_LTS_RELEASE_VERSION #undef ABSL_LTS_RELEASE_PATCH_LEVEL // Helper macro to convert a CPP variable to a string literal. #define ABSL_INTERNAL_DO_TOKEN_STR(x) … #define ABSL_INTERNAL_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 … 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) … #elif ABSL_OPTION_USE_INLINE_NAMESPACE == 1 #define ABSL_NAMESPACE_BEGIN … #define ABSL_NAMESPACE_END … #define ABSL_INTERNAL_C_SYMBOL_HELPER_2 … #define ABSL_INTERNAL_C_SYMBOL_HELPER_1 … #define ABSL_INTERNAL_C_SYMBOL … #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) … #else #define ABSL_HAVE_BUILTIN … #endif #ifdef __has_feature #define ABSL_HAVE_FEATURE(f) … #else #define ABSL_HAVE_FEATURE … #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) … #else #define ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION … #endif #if defined(__clang__) && defined(__clang_major__) && defined(__clang_minor__) #define ABSL_INTERNAL_HAVE_MIN_CLANG_VERSION(x, y) … #else #define ABSL_INTERNAL_HAVE_MIN_CLANG_VERSION … #endif // ABSL_HAVE_TLS is defined to 1 when __thread should be supported. // We assume __thread is supported on Linux 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(__clang__) || defined(_GLIBCXX_HAVE_TLS)) #define ABSL_HAVE_TLS … #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 … #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 … #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 … #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 … #endif // ABSL_HAVE_THREAD_LOCAL // // DEPRECATED - `thread_local` is available on all supported platforms. // 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 #else #define ABSL_HAVE_THREAD_LOCAL … #endif // 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 … #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 … #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 … #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 … #endif // defined(__EXCEPTIONS) && ABSL_HAVE_FEATURE(cxx_exceptions) // Handle remaining special cases and default to exceptions being supported. #elif !(defined(__GNUC__) && !defined(__cpp_exceptions)) && \ !(defined(_MSC_VER) && !defined(_CPPUNWIND)) #define ABSL_HAVE_EXCEPTIONS … #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(__myriad2__) || defined(__HAIKU__) || \ defined(__OpenBSD__) || defined(__NetBSD__) || defined(__QNX__) || \ defined(__VXWORKS__) || defined(__hexagon__) #define ABSL_HAVE_MMAP … #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 … #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 … #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 … #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 … #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 … #elif defined(__GLIBC__) // feature test for glibc #define ABSL_HAVE_ALARM … #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 … #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 … #elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \ __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ #define ABSL_IS_BIG_ENDIAN … #elif defined(_WIN32) #define ABSL_IS_LITTLE_ENDIAN … #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 … #else #define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE … #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 … #elif defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \ ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L && \ !ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE #define ABSL_HAVE_STD_ANY … #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 … #elif defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \ ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L && \ !ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE #define ABSL_HAVE_STD_OPTIONAL … #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 … #elif defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \ ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L && \ !ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE #define ABSL_HAVE_STD_VARIANT … #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 … #elif defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \ ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L #define ABSL_HAVE_STD_STRING_VIEW … #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 … #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 … #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 … #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 … #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 … #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 … #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 … #define ABSL_INTERNAL_MANGLED_BACKREFERENCE … #else #define ABSL_INTERNAL_MANGLED_NS … #define ABSL_INTERNAL_MANGLED_BACKREFERENCE … #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 … #elif defined(ABSL_CONSUME_DLL) #define ABSL_DLL … #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 … #elif defined(ABSL_CONSUME_TEST_DLL) #define ABSL_TEST_DLL … #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 … #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 … #elif ABSL_HAVE_FEATURE(thread_sanitizer) #define ABSL_HAVE_THREAD_SANITIZER … #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 … #elif ABSL_HAVE_FEATURE(address_sanitizer) #define ABSL_HAVE_ADDRESS_SANITIZER … #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 … #elif ABSL_HAVE_FEATURE(hwaddress_sanitizer) #define ABSL_HAVE_HWADDRESS_SANITIZER … #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 … #elif ABSL_HAVE_FEATURE(dataflow_sanitizer) #define ABSL_HAVE_DATAFLOW_SANITIZER … #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 … // Clang standalone LeakSanitizer (-fsanitize=leak) #elif ABSL_HAVE_FEATURE(leak_sanitizer) #define ABSL_HAVE_LEAK_SANITIZER … #elif defined(ABSL_HAVE_ADDRESS_SANITIZER) // GCC or Clang using the LeakSanitizer integrated into AddressSanitizer. #define ABSL_HAVE_LEAK_SANITIZER … #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 … #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 … #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 … #elif defined(__GNUC__) && defined(__GXX_RTTI) #define ABSL_INTERNAL_HAS_RTTI … #elif defined(_MSC_VER) && defined(_CPPRTTI) #define ABSL_INTERNAL_HAS_RTTI … #elif !defined(__GNUC__) && !defined(_MSC_VER) // Unknown compiler, default to RTTI #define ABSL_INTERNAL_HAS_RTTI … #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 … #elif defined(__GNUC__) #define ABSL_INTERNAL_HAS_CXA_DEMANGLE … #elif defined(__clang__) && !defined(_MSC_VER) #define ABSL_INTERNAL_HAS_CXA_DEMANGLE … #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 … #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 … #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 … #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 … #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 … #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(__NVCC__) && defined(__CUDACC__)) #define ABSL_INTERNAL_HAVE_ARM_NEON … #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 … #elif ABSL_HAVE_BUILTIN(__builtin_is_constant_evaluated) #define ABSL_HAVE_CONSTANT_EVALUATED … #endif // ABSL_INTERNAL_CONSTEXPR_SINCE_CXXYY is used to conditionally define constexpr // for different C++ versions. // // These macros are an implementation detail and will be unconditionally removed // once the minimum supported C++ version catches up to a given version. // // For this reason, this symbol is considered INTERNAL and code outside of // Abseil must not use it. #if defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \ ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L #define ABSL_INTERNAL_CONSTEXPR_SINCE_CXX17 … #else #define ABSL_INTERNAL_CONSTEXPR_SINCE_CXX17 #endif #if defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \ ABSL_INTERNAL_CPLUSPLUS_LANG >= 202002L #define ABSL_INTERNAL_CONSTEXPR_SINCE_CXX20 … #else #define ABSL_INTERNAL_CONSTEXPR_SINCE_CXX20 #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__ #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 … #endif #endif #endif // ABSL_BASE_CONFIG_H_
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