[PATCH] testsuite: add dg-require-atomic-cmpxchg-word to chrono tests
Torbjorn SVENSSON
torbjorn.svensson@foss.st.com
Mon Jun 22 09:55:44 GMT 2026
Hi Jonathan,
Did you find any way to get this to work without atomics?
Kind regards,
Torbjörn
On 2026-06-12 12:01, Torbjorn SVENSSON wrote:
>
>
> On 2026-06-12 11:49, Jonathan Wakely wrote:
>> On Mon, 8 Jun 2026 at 14:21, Torbjörn SVENSSON
>> <torbjorn.svensson@foss.st.com> wrote:
>>>
>>> Ok for trunk?
>>
>> Hmm, I think I'd rather make this work without atomics.
>> I can look at this on Monday.
>
> That would be even better.
> If you find a way to make this work without atomics, please let me know and I'll drop this patch from my queue.
>
> Btw, forgot to mention that I see the error starting with r17-471-ge79f0f818c0e42.
>
> Kind regards,
> Torbjörn
>
>>
>>>
>>> Kind regards,
>>> Torbjörn
>>>
>>> --
>>>
>>> On target that does not support atomic word operations, like Cortex-M0,
>>> the following error can be seen in the logs:
>>>
>>> /build/r17-1372-g80b78b2504fba0/arm-none-eabi/bin/ld: /build/r17-1372-g80b78b2504fba0/bin/../lib/gcc/arm-none-eabi/17.0.0/../../../../arm-none-eabi/lib/thumb/v6-m/nofp/libstdc++.a(tzdb.o): in function `std::chrono::__detail::__recent_leap_second_info(std::chrono::leap_second_info&, unsigned int)':
>>> (.text._ZNSt6chrono8__detail25__recent_leap_second_infoERNS_16leap_second_infoEj+0xf0): undefined reference to `__atomic_compare_exchange_4'
>>> /build/r17-1372-g80b78b2504fba0/arm-none-eabi/bin/ld: (__atomic_compare_exchange_4): Unknown destination type (ARM/Thumb) in /build/r17-1372-g80b78b2504fba0/bin/../lib/gcc/arm-none-eabi/17.0.0/../../../../arm-none-eabi/lib/thumb/v6-m/nofp/libstdc++.a(tzdb.o)
>>> (.text._ZNSt6chrono8__detail25__recent_leap_second_infoERNS_16leap_second_infoEj+0xf0): dangerous relocation: unsupported relocation
>>> collect2: error: ld returned 1 exit status
>>>
>>> libstdc++-v3/ChangeLog:
>>>
>>> * testsuite/std/time/clock/gps/1.cc: Add
>>> dg-require-atomic-cmpxchg-word to test.
>>> * testsuite/std/time/clock/tai/1.cc: Likewise.
>>> * testsuite/std/time/clock/utc/1.cc: Likewise.
>>> * testsuite/std/time/clock/utc/io.cc: Likewise.
>>> * testsuite/std/time/clock/utc/leap_second_info-2.cc: Likewise.
>>> * testsuite/std/time/clock/utc/leap_second_info.cc: Likewise.
>>> * testsuite/std/time/exceptions.cc: Likewise.
>>> * testsuite/std/time/format/empty_spec.cc: Likewise.
>>> * testsuite/std/time/format/format.cc: Likewise.
>>> * testsuite/std/time/hash.cc: Likewise.
>>> * testsuite/std/time/leap_seconds/io.cc: Likewise.
>>> * testsuite/std/time/parse/114240.cc: Likewise.
>>> * testsuite/std/time/parse/114279.cc: Likewise.
>>> * testsuite/std/time/time_zone/116110.cc: Likewise.
>>> * testsuite/std/time/time_zone/124513.cc: Likewise.
>>> * testsuite/std/time/time_zone/get_info_local.cc: Likewise.
>>> * testsuite/std/time/time_zone/get_info_sys.cc: Likewise.
>>> * testsuite/std/time/time_zone/numeric_save.cc: Likewise.
>>> * testsuite/std/time/time_zone/sys_info_abbrev.cc: Likewise.
>>> * testsuite/std/time/time_zone/until_day_on.cc: Likewise.
>>> * testsuite/std/time/tzdb/1.cc: Likewise.
>>> * testsuite/std/time/tzdb/leap_seconds.cc: Likewise.
>>> * testsuite/std/time/tzdb/links.cc: Likewise.
>>> * testsuite/std/time/tzdb_list/1.cc: Likewise.
>>> * testsuite/std/time/tzdb_list/pr118811.cc: Likewise.
>>> * testsuite/std/time/zoned_time/1.cc: Likewise.
>>> * testsuite/std/time/zoned_time/custom.cc: Likewise.
>>> * testsuite/std/time/zoned_time/io.cc: Likewise.
>>> * testsuite/std/time/zoned_traits.cc: Likewise.
>>>
>>> Signed-off-by: Torbjörn SVENSSON <torbjorn.svensson@foss.st.com>
>>> ---
>>> libstdc++-v3/testsuite/std/time/clock/gps/1.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/clock/tai/1.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/clock/utc/1.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/clock/utc/io.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/clock/utc/leap_second_info-2.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/clock/utc/leap_second_info.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/exceptions.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/format/empty_spec.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/format/format.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/hash.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/leap_seconds/io.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/parse/114240.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/parse/114279.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/time_zone/116110.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/time_zone/124513.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/time_zone/get_info_local.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/time_zone/get_info_sys.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/time_zone/numeric_save.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/time_zone/sys_info_abbrev.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/time_zone/until_day_on.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/tzdb/1.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/tzdb/leap_seconds.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/tzdb/links.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/tzdb_list/1.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/tzdb_list/pr118811.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/zoned_time/1.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/zoned_time/custom.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/zoned_time/io.cc | 1 +
>>> libstdc++-v3/testsuite/std/time/zoned_traits.cc | 1 +
>>> 29 files changed, 29 insertions(+)
>>>
>>> diff --git a/libstdc++-v3/testsuite/std/time/clock/gps/1.cc b/libstdc++-v3/testsuite/std/time/clock/gps/1.cc
>>> index 8be517b316b..48ae2e9b3ae 100644
>>> --- a/libstdc++-v3/testsuite/std/time/clock/gps/1.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/clock/gps/1.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>>
>>> #include <chrono>
>>> #include <testsuite_hooks.h>
>>> diff --git a/libstdc++-v3/testsuite/std/time/clock/tai/1.cc b/libstdc++-v3/testsuite/std/time/clock/tai/1.cc
>>> index 63cc9927859..5ad27d4f532 100644
>>> --- a/libstdc++-v3/testsuite/std/time/clock/tai/1.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/clock/tai/1.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>>
>>> #include <chrono>
>>> #include <testsuite_hooks.h>
>>> diff --git a/libstdc++-v3/testsuite/std/time/clock/utc/1.cc b/libstdc++-v3/testsuite/std/time/clock/utc/1.cc
>>> index 4852658001e..f574ff41686 100644
>>> --- a/libstdc++-v3/testsuite/std/time/clock/utc/1.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/clock/utc/1.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>>
>>> #include <chrono>
>>> #include <testsuite_hooks.h>
>>> diff --git a/libstdc++-v3/testsuite/std/time/clock/utc/io.cc b/libstdc++-v3/testsuite/std/time/clock/utc/io.cc
>>> index ed1daa7a855..8e168bc35d7 100644
>>> --- a/libstdc++-v3/testsuite/std/time/clock/utc/io.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/clock/utc/io.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-timeout-factor 2 }
>>>
>>> #include <chrono>
>>> diff --git a/libstdc++-v3/testsuite/std/time/clock/utc/leap_second_info-2.cc b/libstdc++-v3/testsuite/std/time/clock/utc/leap_second_info-2.cc
>>> index 59634b34944..7cf97ca271d 100644
>>> --- a/libstdc++-v3/testsuite/std/time/clock/utc/leap_second_info-2.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/clock/utc/leap_second_info-2.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>> // { dg-require-effective-target cxx11_abi }
>>> // { dg-xfail-run-if "no weak override on AIX" { powerpc-ibm-aix* } }
>>> diff --git a/libstdc++-v3/testsuite/std/time/clock/utc/leap_second_info.cc b/libstdc++-v3/testsuite/std/time/clock/utc/leap_second_info.cc
>>> index 2fabda49423..7272772188a 100644
>>> --- a/libstdc++-v3/testsuite/std/time/clock/utc/leap_second_info.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/clock/utc/leap_second_info.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-additional-options "-DHAVE_TZDB" { target tzdb } }
>>>
>>> #include <chrono>
>>> diff --git a/libstdc++-v3/testsuite/std/time/exceptions.cc b/libstdc++-v3/testsuite/std/time/exceptions.cc
>>> index 06b8a53c353..e455eb6f271 100644
>>> --- a/libstdc++-v3/testsuite/std/time/exceptions.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/exceptions.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>>
>>> #include <chrono>
>>> diff --git a/libstdc++-v3/testsuite/std/time/format/empty_spec.cc b/libstdc++-v3/testsuite/std/time/format/empty_spec.cc
>>> index b84f84a3069..6eef475d815 100644
>>> --- a/libstdc++-v3/testsuite/std/time/format/empty_spec.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/format/empty_spec.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target hosted }
>>> // { dg-timeout-factor 5 }
>>>
>>> diff --git a/libstdc++-v3/testsuite/std/time/format/format.cc b/libstdc++-v3/testsuite/std/time/format/format.cc
>>> index d1aee053acd..ac8c1cc1f59 100644
>>> --- a/libstdc++-v3/testsuite/std/time/format/format.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/format/format.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-timeout-factor 2 }
>>>
>>> #include <chrono>
>>> diff --git a/libstdc++-v3/testsuite/std/time/hash.cc b/libstdc++-v3/testsuite/std/time/hash.cc
>>> index ed9139bb810..a511099207e 100644
>>> --- a/libstdc++-v3/testsuite/std/time/hash.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/hash.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++26 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>>
>>> #include <chrono>
>>> #include <unordered_set>
>>> diff --git a/libstdc++-v3/testsuite/std/time/leap_seconds/io.cc b/libstdc++-v3/testsuite/std/time/leap_seconds/io.cc
>>> index 511fafdd1a0..3c721f29543 100644
>>> --- a/libstdc++-v3/testsuite/std/time/leap_seconds/io.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/leap_seconds/io.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>> // { dg-require-effective-target cxx11_abi }
>>>
>>> diff --git a/libstdc++-v3/testsuite/std/time/parse/114240.cc b/libstdc++-v3/testsuite/std/time/parse/114240.cc
>>> index 46310efd09a..188690ab9d9 100644
>>> --- a/libstdc++-v3/testsuite/std/time/parse/114240.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/parse/114240.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>>
>>> // PR libstdc++/114240 sys_days not being parsed with only a date in the stream
>>>
>>> diff --git a/libstdc++-v3/testsuite/std/time/parse/114279.cc b/libstdc++-v3/testsuite/std/time/parse/114279.cc
>>> index 67e5cba23bd..dbb9fdb5774 100644
>>> --- a/libstdc++-v3/testsuite/std/time/parse/114279.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/parse/114279.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>>
>>> #include <chrono>
>>> #include <sstream>
>>> diff --git a/libstdc++-v3/testsuite/std/time/time_zone/116110.cc b/libstdc++-v3/testsuite/std/time/time_zone/116110.cc
>>> index 26b9ba33c31..47fa427b7f7 100644
>>> --- a/libstdc++-v3/testsuite/std/time/time_zone/116110.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/time_zone/116110.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>> // { dg-require-effective-target cxx11_abi }
>>>
>>> diff --git a/libstdc++-v3/testsuite/std/time/time_zone/124513.cc b/libstdc++-v3/testsuite/std/time/time_zone/124513.cc
>>> index 49d7ba8bb01..c02beb28147 100644
>>> --- a/libstdc++-v3/testsuite/std/time/time_zone/124513.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/time_zone/124513.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>> // { dg-require-effective-target cxx11_abi }
>>> // { dg-xfail-run-if "no weak override on AIX" { powerpc-ibm-aix* } }
>>> diff --git a/libstdc++-v3/testsuite/std/time/time_zone/get_info_local.cc b/libstdc++-v3/testsuite/std/time/time_zone/get_info_local.cc
>>> index d2972aca7df..609dc6ae49a 100644
>>> --- a/libstdc++-v3/testsuite/std/time/time_zone/get_info_local.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/time_zone/get_info_local.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>>
>>> #include <chrono>
>>> diff --git a/libstdc++-v3/testsuite/std/time/time_zone/get_info_sys.cc b/libstdc++-v3/testsuite/std/time/time_zone/get_info_sys.cc
>>> index 88f16b76ff4..05f1b40cf65 100644
>>> --- a/libstdc++-v3/testsuite/std/time/time_zone/get_info_sys.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/time_zone/get_info_sys.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>>
>>> #include <chrono>
>>> diff --git a/libstdc++-v3/testsuite/std/time/time_zone/numeric_save.cc b/libstdc++-v3/testsuite/std/time/time_zone/numeric_save.cc
>>> index 687524bb355..4761e3d3c5e 100644
>>> --- a/libstdc++-v3/testsuite/std/time/time_zone/numeric_save.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/time_zone/numeric_save.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>> // { dg-require-effective-target cxx11_abi }
>>> // { dg-xfail-run-if "no weak override on AIX" { powerpc-ibm-aix* } }
>>> diff --git a/libstdc++-v3/testsuite/std/time/time_zone/sys_info_abbrev.cc b/libstdc++-v3/testsuite/std/time/time_zone/sys_info_abbrev.cc
>>> index f1a8fff02f5..86508c543a0 100644
>>> --- a/libstdc++-v3/testsuite/std/time/time_zone/sys_info_abbrev.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/time_zone/sys_info_abbrev.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>> // { dg-require-effective-target cxx11_abi }
>>> // { dg-xfail-run-if "no weak override on AIX" { powerpc-ibm-aix* } }
>>> diff --git a/libstdc++-v3/testsuite/std/time/time_zone/until_day_on.cc b/libstdc++-v3/testsuite/std/time/time_zone/until_day_on.cc
>>> index 38e4bc254cc..9ca407655ab 100644
>>> --- a/libstdc++-v3/testsuite/std/time/time_zone/until_day_on.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/time_zone/until_day_on.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>> // { dg-require-effective-target cxx11_abi }
>>> // { dg-xfail-run-if "no weak override on AIX" { powerpc-ibm-aix* } }
>>> diff --git a/libstdc++-v3/testsuite/std/time/tzdb/1.cc b/libstdc++-v3/testsuite/std/time/tzdb/1.cc
>>> index 7a31c1c20ba..d68968da226 100644
>>> --- a/libstdc++-v3/testsuite/std/time/tzdb/1.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/tzdb/1.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target cxx11_abi }
>>>
>>> #include <chrono>
>>> diff --git a/libstdc++-v3/testsuite/std/time/tzdb/leap_seconds.cc b/libstdc++-v3/testsuite/std/time/tzdb/leap_seconds.cc
>>> index 5999635a89f..0a1cf04a62e 100644
>>> --- a/libstdc++-v3/testsuite/std/time/tzdb/leap_seconds.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/tzdb/leap_seconds.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>> // { dg-require-effective-target cxx11_abi }
>>> // { dg-xfail-run-if "no weak override on AIX" { powerpc-ibm-aix* } }
>>> diff --git a/libstdc++-v3/testsuite/std/time/tzdb/links.cc b/libstdc++-v3/testsuite/std/time/tzdb/links.cc
>>> index 0ba214846c6..676e1ba7804 100644
>>> --- a/libstdc++-v3/testsuite/std/time/tzdb/links.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/tzdb/links.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>> // { dg-require-effective-target cxx11_abi }
>>> // { dg-xfail-run-if "no weak override on AIX" { powerpc-ibm-aix* } }
>>> diff --git a/libstdc++-v3/testsuite/std/time/tzdb_list/1.cc b/libstdc++-v3/testsuite/std/time/tzdb_list/1.cc
>>> index 587aa950277..18827f15378 100644
>>> --- a/libstdc++-v3/testsuite/std/time/tzdb_list/1.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/tzdb_list/1.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>> // { dg-require-effective-target cxx11_abi }
>>>
>>> diff --git a/libstdc++-v3/testsuite/std/time/tzdb_list/pr118811.cc b/libstdc++-v3/testsuite/std/time/tzdb_list/pr118811.cc
>>> index fe86602ecce..38139e5ca38 100644
>>> --- a/libstdc++-v3/testsuite/std/time/tzdb_list/pr118811.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/tzdb_list/pr118811.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>> // { dg-require-effective-target cxx11_abi }
>>> // { dg-require-static-libstdcxx "" }
>>> diff --git a/libstdc++-v3/testsuite/std/time/zoned_time/1.cc b/libstdc++-v3/testsuite/std/time/zoned_time/1.cc
>>> index a77cd99dd55..dfead853e26 100644
>>> --- a/libstdc++-v3/testsuite/std/time/zoned_time/1.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/zoned_time/1.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>> // { dg-require-effective-target cxx11_abi }
>>>
>>> diff --git a/libstdc++-v3/testsuite/std/time/zoned_time/custom.cc b/libstdc++-v3/testsuite/std/time/zoned_time/custom.cc
>>> index 83e1f6dca43..1f5056c3c76 100644
>>> --- a/libstdc++-v3/testsuite/std/time/zoned_time/custom.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/zoned_time/custom.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target tzdb }
>>>
>>> #include <chrono>
>>> diff --git a/libstdc++-v3/testsuite/std/time/zoned_time/io.cc b/libstdc++-v3/testsuite/std/time/zoned_time/io.cc
>>> index c113eea6d3f..a95bc629698 100644
>>> --- a/libstdc++-v3/testsuite/std/time/zoned_time/io.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/zoned_time/io.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target cxx11_abi }
>>> // { dg-timeout-factor 2 }
>>>
>>> diff --git a/libstdc++-v3/testsuite/std/time/zoned_traits.cc b/libstdc++-v3/testsuite/std/time/zoned_traits.cc
>>> index 83cf6635127..4ccf6e74aaf 100644
>>> --- a/libstdc++-v3/testsuite/std/time/zoned_traits.cc
>>> +++ b/libstdc++-v3/testsuite/std/time/zoned_traits.cc
>>> @@ -1,4 +1,5 @@
>>> // { dg-do run { target c++20 } }
>>> +// { dg-require-atomic-cmpxchg-word "" }
>>> // { dg-require-effective-target cxx11_abi }
>>>
>>> #include <chrono>
>>> --
>>> 2.43.0
>>>
>>
>
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