From 7d569b0fafe76e9036695ccc9d22d2195c214bce Mon Sep 17 00:00:00 2001
From: Azat Khuzhin <azat@libevent.org>
Date: Sun, 2 Jun 2019 20:20:02 +0300
Subject: [PATCH] Fix detection of the __has_attribute() for apple clang [ci
 skip]

Fixes build on the next osx env:
- Mac OS 10.9/clang 600
- Mac OS 10.8/clang 500

Refs: https://github.com/libevent/libevent/issues/447#issuecomment-497908488
---
 util-internal.h | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/util-internal.h b/util-internal.h
index b727bf1f..39576c71 100644
--- a/util-internal.h
+++ b/util-internal.h
@@ -52,16 +52,22 @@ extern "C" {
 
 /* __has_attribute() wrapper */
 #ifdef __has_attribute
-#define EVUTIL_HAS_ATTRIBUTE __has_attribute
+# define EVUTIL_HAS_ATTRIBUTE __has_attribute
 #endif
 /** clang 3 __has_attribute misbehaves in some versions */
-#if defined(__clang__) && \
-	__clang__ == 1 && __clang_major__ == 3 && \
-	(__clang_minor__ >= 2 && __clang_minor__ <= 5)
-#undef EVUTIL_HAS_ATTRIBUTE
-#endif
+#if defined(__clang__) && __clang__ == 1
+# if defined(__apple_build_version__)
+#  if __clang_major__ <= 6
+#   undef EVUTIL_HAS_ATTRIBUTE
+#  endif
+# else /* !__apple_build_version__ */
+#  if __clang_major__ == 3 && __clang_minor__ >= 2 && __clang_minor__ <= 5
+#   undef EVUTIL_HAS_ATTRIBUTE
+#  endif
+# endif /* __apple_build_version__ */
+#endif /*\ defined(__clang__) && __clang__ == 1 */
 #ifndef EVUTIL_HAS_ATTRIBUTE
-#define EVUTIL_HAS_ATTRIBUTE(x) 0
+# define EVUTIL_HAS_ATTRIBUTE(x) 0
 #endif
 
 /* If we need magic to say "inline", get it for free internally. */
-- 
2.40.0