diff options
Diffstat (limited to 'absl/base/config.h')
| -rw-r--r-- | absl/base/config.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/absl/base/config.h b/absl/base/config.h index cf47f84c3356..c768e7223b93 100644 --- a/absl/base/config.h +++ b/absl/base/config.h @@ -56,6 +56,13 @@ #include <cstddef> #endif // __cplusplus +#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/policy_checks.h" // ----------------------------------------------------------------------------- @@ -151,12 +158,13 @@ // // Checks whether C++11's `thread_local` storage duration specifier is // supported. -// -// Notes: Clang implements the `thread_local` keyword but Xcode did not support -// the implementation until Xcode 8. #ifdef ABSL_HAVE_THREAD_LOCAL #error ABSL_HAVE_THREAD_LOCAL cannot be directly set -#elif !defined(__apple_build_version__) || __apple_build_version__ >= 8000042 +#elif !defined(__apple_build_version__) || \ + ((__apple_build_version__ >= 8000042) && \ + !(TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_8_0)) +// Notes: Xcode's clang did not support `thread_local` until version +// 8, and even then not for iOS < 8.0. #define ABSL_HAVE_THREAD_LOCAL 1 #endif |