On 08/12/21 5:21 pm, Jonathan Wakely wrote:
> It looks like I never replied to this one, sorry.
>
> On Sun, 28 Feb 2021 at 14:51, François Dumont via Libstdc++
> <libstdc++@gcc.gnu.org> wrote:
>> Hi
>>
>>       I took in bugzilla and started working on this enhancement.
>>
>>       I am in the step of implementing what is in
>> src/c++11/cow-stdexception.cc for the sso string.
> Maybe I've misunderstood, but why? The content of that file is
> explicitly for the COW string, and only the COW string.
I meant to do something similar for the sso string.
>
> If we make the versioned namespace **only** support SSO strings (and I
> think we should do that) then that file won't even be compiled,
> because the DUAL_ABI macro will not be defined.
>
>> As I do not know much
>> about transactionnal memory yet I prefer to ask confirmation first that
>> it is indeed a necessary step to complete PR 83077 ?
>
> It's not essential. If needed, we can disable TM for the versioned namespace.
>
Ok, thanks for the information.

But this mail has been the occasion to check where I was on this 
subject. Attached is my current work. I managed to build the lib, no 
more transactional memory issue. But when building the tests I have this 
error in different tests:

double free or corruption (out)
FAIL: 27_io/basic_filebuf/overflow/char/13858.cc execution test

Still need to find time to work on this.

François