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-rw-r--r--lib/Headers/unwind.h7
1 files changed, 3 insertions, 4 deletions
diff --git a/lib/Headers/unwind.h b/lib/Headers/unwind.h
index cef20cc214..28ad8043f2 100644
--- a/lib/Headers/unwind.h
+++ b/lib/Headers/unwind.h
@@ -23,10 +23,9 @@
/* See "Data Definitions for libgcc_s" in the Linux Standard Base.*/
-#if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \
- __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1070
-/* Starting in OS X Lion the SDK includes a unwind.h. We should just use it. */
-#include_next <unwind.h>
+#if defined(__APPLE__) && __has_include_next(<unwind.h>)
+/* Darwin typically has its own unwind.h; use it. */
+# include_next <unwind.h>
#else
#include <stdint.h>