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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/114103] FAIL: 29_atomics/atomic/lock_free_aliases.cc 
 -std=gnu++20 (test for excess errors)
Date: Thu, 29 Feb 2024 17:44:05 +0000
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X-Bugzilla-Component: libstdc++
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: patch, testsuite-fail
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114103

--- Comment #10 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This additional change should fix that:

--- a/libstdc++-v3/src/c++20/tzdb.cc
+++ b/libstdc++-v3/src/c++20/tzdb.cc
@@ -643,6 +643,7 @@ namespace std::chrono
        void unlock() { infos_mutex.unlock(); }
       };

+#if __cpp_lib_atomic_lock_free_type_aliases
 #if defined __GTHREADS && __cpp_lib_atomic_wait
     // Atomic count of unexpanded ZoneInfo objects in the infos vector.
     // Concurrent access is allowed when all objects have been expanded.
@@ -704,6 +705,7 @@ namespace std::chrono
 #endif // __GTHREADS && __cpp_lib_atomic_wait

     RulesCounter<atomic_signed_lock_free> rules_counter;
+#endif // __cpp_lib_atomic_lock_free_type_aliases
 #else // TZDB_DISABLED
     _Impl(weak_ptr<tzdb_list::_Node>) { }
     struct {=