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-rw-r--r--libcxx/src/thread.cpp11
1 files changed, 8 insertions, 3 deletions
diff --git a/libcxx/src/thread.cpp b/libcxx/src/thread.cpp
index bd27f287838..2243a34eb33 100644
--- a/libcxx/src/thread.cpp
+++ b/libcxx/src/thread.cpp
@@ -16,10 +16,15 @@
#include "future"
#include "limits"
#include <sys/types.h>
-#if !defined(_WIN32)
-# if !defined(__sun__) && !defined(__linux__) && !defined(_AIX) && !defined(__native_client__) && !defined(__CloudABI__)
+
+#if defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
+# include <sys/param.h>
+# if defined(BSD)
# include <sys/sysctl.h>
-# endif // !defined(__sun__) && !defined(__linux__) && !defined(_AIX) && !defined(__native_client__) && !defined(__CloudABI__)
+# endif // defined(BSD)
+#endif // defined(__unix__) || (defined(__APPLE__) && defined(__MACH__))
+
+#if !defined(_WIN32)
# include <unistd.h>
#endif // !_WIN32
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