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-rw-r--r--libcxx/include/__config7
1 files changed, 3 insertions, 4 deletions
diff --git a/libcxx/include/__config b/libcxx/include/__config
index 3a0e71e2e05..a05bd9228b8 100644
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -894,7 +894,8 @@ _LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container(
#endif
// Thread API
-#if !defined(_LIBCPP_HAS_NO_THREADS)
+#if !defined(_LIBCPP_HAS_NO_THREADS) && \
+ !defined(_LIBCPP_HAS_THREAD_API_PTHREAD)
# if defined(__FreeBSD__) || \
defined(__Fuchsia__) || \
defined(__NetBSD__) || \
@@ -902,9 +903,7 @@ _LIBCPP_FUNC_VIS extern "C" void __sanitizer_annotate_contiguous_container(
defined(__APPLE__) || \
defined(__CloudABI__) || \
defined(__sun__)
-# ifndef _LIBCPP_HAS_THREAD_API_PTHREAD
-# define _LIBCPP_HAS_THREAD_API_PTHREAD
-# endif
+# define _LIBCPP_HAS_THREAD_API_PTHREAD
# else
# error "No thread API"
# endif // _LIBCPP_HAS_THREAD_API
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