Disable workaround in stack_pop_acquire that was needed for ancient Clang

* src/atomic_ops_stack.c [!USE_ALMOST_LOCK_FREE
&& AO_HAVE_compare_double_and_swap_double && __clang__]
(AO_stack_pop_acquire): Do not declare cptr local variable as volatile
if AO_CLANG_PREREQ(3, 5).

diff --git a/src/atomic_ops_stack.c b/src/atomic_ops_stack.c
index b57ed85..b607c74 100644 (file)
--- a/src/atomic_ops_stack.c
+++ b/src/atomic_ops_stack.c
@@ -230,7 +230,7 @@ void AO_stack_push_release(AO_stack_t *list, AO_t *element)
 AO_ATTR_NO_SANITIZE_THREAD
 AO_t *AO_stack_pop_acquire(AO_stack_t *list)
 {
-#   ifdef __clang__
+#   if defined(__clang__) && !AO_CLANG_PREREQ(3, 5)
       AO_t *volatile cptr;
                         /* Use volatile to workaround a bug in          */
                         /* clang-1.1/x86 causing test_stack failure.    */