diff options
| -rw-r--r-- | absl/base/config.h | 48 |
1 files changed, 18 insertions, 30 deletions
diff --git a/absl/base/config.h b/absl/base/config.h index e6c9d0c2..0037bab9 100644 --- a/absl/base/config.h +++ b/absl/base/config.h @@ -522,41 +522,29 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' || #error "absl endian detection needs to be set up for your compiler" #endif -// macOS < 10.13 and iOS < 11 don't let you use <any>, <optional>, or <variant> -// even though the headers exist and are publicly noted to work, 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 +// 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. -// -// Unfortunately, Apple initially mis-stated the requirements as macOS < 10.14 -// and iOS < 12 in the libc++ headers. This was corrected by +// _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS. The set of versions has been +// modified a few times, via // https://github.com/llvm/llvm-project/commit/7fb40e1569dd66292b647f4501b85517e9247953 -// which subsequently made it into the XCode 12.5 release. We need to match the -// old (incorrect) conditions when built with old XCode, but can use the -// corrected earlier versions with new XCode. -#if defined(__APPLE__) && defined(_LIBCPP_VERSION) && \ - ((_LIBCPP_VERSION >= 11000 && /* XCode 12.5 or later: */ \ - ((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__ < 110000) || \ - (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && \ - __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 40000) || \ - (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && \ - __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 110000))) || \ - (_LIBCPP_VERSION < 11000 && /* Pre-XCode 12.5: */ \ - ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \ - __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101400) || \ - (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)))) +// 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 |