From 133375739ed5dd59bb3f3efeaf9db17f32bf36e1 Mon Sep 17 00:00:00 2001
From: Frank Schaefer <frank.schaefer@tekcomms.com>
Date: Tue, 9 Jun 2015 17:10:00 -0500
Subject: [PATCH 17/20] Fix GCC 5.x compatibility for AArch64 double-wide
 primitives

Small change to make aarch64 support work with gcc 5.x. Otherwise it
demands gcc -latomic and still fails test_stack.

* src/atomic_ops/sysdeps/gcc/aarch64.h (AO_double_load,
AO_double_load_acquire, AO_double_store, AO_double_store_release,
AO_double_compare_and_swap, AO_double_compare_and_swap_acquire,
AO_double_compare_and_swap_release, AO_double_compare_and_swap_full):
Use assembly implementation even for GCC v5+ (not just GCC 4.x).
---
 src/atomic_ops/sysdeps/gcc/aarch64.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/atomic_ops/sysdeps/gcc/aarch64.h b/src/atomic_ops/sysdeps/gcc/aarch64.h
index 54e6d7f..b9624ef 100644
--- a/src/atomic_ops/sysdeps/gcc/aarch64.h
+++ b/src/atomic_ops/sysdeps/gcc/aarch64.h
@@ -29,7 +29,7 @@
 #endif
 
 /* TODO: Adjust version check on fixing double-wide AO support in GCC. */
-#if __GNUC__ == 4
+#if __GNUC__ >= 4
 
   AO_INLINE AO_double_t
   AO_double_load(const volatile AO_double_t *addr)
@@ -194,6 +194,6 @@
     return !result;
   }
 # define AO_HAVE_double_compare_and_swap_full
-#endif /* __GNUC__ == 4 */
+#endif /* __GNUC__ >= 4 */
 
 #include "generic.h"
-- 
1.9.3