[Bug libstdc++/114865] [13/14/15 Regression] std::atomic::compare_exchange_strong seems to hang under GCC 13 for C++11

[redi at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114865

--- Comment #15 from Jonathan Wakely <redi at gcc dot gnu.org> ---
--- a/libstdc++-v3/include/std/atomic
+++ b/libstdc++-v3/include/std/atomic
@@ -238,8 +238,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION

       constexpr atomic(_Tp __i) noexcept : _M_i(__i)
       {
-#if __cplusplus >= 201402L && __has_builtin(__builtin_clear_padding)
+#if __has_builtin(__builtin_clear_padding)
+#if __cplusplus >= 201402L
        if _GLIBCXX17_CONSTEXPR (__atomic_impl::__maybe_has_padding<_Tp>())
+#endif
          __builtin_clear_padding(std::__addressof(_M_i));
 #endif
       }