[gcc r14-4285] testsuite: Require thread-fence for 29_atomics/atomic_flag/cons/value_init.cc

[Hans-Peter Nilsson]

https://gcc.gnu.org/g:dd0c42cd37dab62f9f61ac834333ec899305dee4

commit r14-4285-gdd0c42cd37dab62f9f61ac834333ec899305dee4
Author: Hans-Peter Nilsson <hp@axis.com>
Date:   Tue Sep 26 15:59:02 2023 +0200

    testsuite: Require thread-fence for 29_atomics/atomic_flag/cons/value_init.cc
    
    A recent patch made __atomic_test_and_set no longer fall
    back to emitting non-atomic code, but instead will then emit
    a call to __atomic_test_and_set, thereby exposing the need
    to gate also this test on support for atomics, similar to
    r14-3980-g62b29347c38394.
    
    libstdc++-v3:
            * testsuite/29_atomics/atomic_flag/cons/value_init.cc: Add
            dg-require-thread-fence.

Diff:
---
 libstdc++-v3/testsuite/29_atomics/atomic_flag/cons/value_init.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/libstdc++-v3/testsuite/29_atomics/atomic_flag/cons/value_init.cc b/libstdc++-v3/testsuite/29_atomics/atomic_flag/cons/value_init.cc
index 084e2930f7e..f3f38b54dbc 100644
--- a/libstdc++-v3/testsuite/29_atomics/atomic_flag/cons/value_init.cc
+++ b/libstdc++-v3/testsuite/29_atomics/atomic_flag/cons/value_init.cc
@@ -16,6 +16,7 @@
 // <http://www.gnu.org/licenses/>.
 
 // { dg-do run { target c++20 } }
+// { dg-require-thread-fence "" }
 
 #include <atomic>
 #include <testsuite_hooks.h>