diff options
Diffstat (limited to 'libcxx/include/__threading_support')
| -rw-r--r-- | libcxx/include/__threading_support | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/libcxx/include/__threading_support b/libcxx/include/__threading_support index b36a52ec9cc..86dc8c7be82 100644 --- a/libcxx/include/__threading_support +++ b/libcxx/include/__threading_support @@ -19,9 +19,20 @@ #ifndef _LIBCPP_HAS_NO_THREADS -#if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) && (!defined(__has_include) || __has_include(<__external_threading>)) +// These checks are carefully arranged so as not to trigger a gcc pre-processor +// defect which causes it to fail to parse the __has_include check below, the +// redundancy is intentional. +#if defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) +#if !defined(__clang__) && (_GNUC_VER < 500) #include <__external_threading> -#else +#define _LIBCPP_EXTERNAL_THREADING +#elif !defined(__has_include) || __has_include(<__external_threading>) +#include <__external_threading> +#define _LIBCPP_EXTERNAL_THREADING +#endif +#endif + +#if !defined(_LIBCPP_EXTERNAL_THREADING) #include <pthread.h> #include <sched.h> #endif |
