Re: [PATCH v2] async_die_is_recursing: work around GCC v11.x issue on Fedora

From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Nov 4, 2021, 16:33 UTC
Message-ID: <nycvar.QRO.7.76.6.2111041732290.56@tvgsbejvaqbjf.bet>
In-Reply-To: <CAPUEspiJW8ee_1zoMg6JzJ0ow-2tmPh8iUZK41kfvt6etzEfjQ@mail.gmail.com>

Hi Carlo,

On Thu, 4 Nov 2021, Carlo Arenas wrote:

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> On Thu, Nov 4, 2021 at 1:43 AM Johannes Schindelin
> <Johannes.Schindelin@gmx.de> wrote:
>
> > My best guess is that my GCC (which is v11.2.0) and Fedora's GCC (which is
> > v11.2.1 plus the usual Fedora customization) behave slightly differently
> > with respect to that optional `size-index` argument:
> > `pthread_setspecific()` is essentially declared without a `size-index`, so
> > I guess GCC v11.2.1 probably defaults to `size-index = 1`.
>
> Got to read the whole explanation that Victoria put together.
>
> for the warning to trigger on that gcc, you got also to have the
> attribute in the header as shown by the link[1] she provided, and
> which I am sure could be a nice thing to send toward those helpful
> folks of the MSYS2 project so it can be added to their WinPthread
> headers, as was done in glibc.

D'oh. Of course we do not have glibc in the Git for Windows SDK! Thanks for helping me understand this.

Ciao, Dscho

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>
> Carlo
>
> [1] https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=a1561c3bbe8
>