PING: V7 [PATCH] sysconf: Add _SC_MINSIGSTKSZ/_SC_SIGSTKSZ [BZ #20305]

[Florian Weimer]

* H. J. Lu via Libc-alpha:

> On Wed, Nov 18, 2020 at 7:13 AM Zack Weinberg <zackw@panix.com> wrote:
>>
>> On Wed, Nov 18, 2020 at 9:40 AM H.J. Lu <hjl.tools@gmail.com> wrote:
>> > On Wed, Nov 18, 2020 at 6:26 AM Zack Weinberg <zackw@panix.com> wrote:
>> > >
>> > > On Wed, Nov 18, 2020 at 9:14 AM H.J. Lu via Libc-alpha
>> > > <libc-alpha@sourceware.org> wrote:
>> > > >
>> > > > If there are no more comments, I will check in it together with
>> > > >
>> > > > https://sourceware.org/pipermail/libc-alpha/2020-October/118707.html
>> > > >
>> > > > on Friday, Nov 20.
>> > >
>> > > I don't think you have consensus for this ABI-breaking change, and I
>> > > *certainly* don't think you should check it in without positive
>> > > agreement from at least one other person.
>> > >
>> >
>> > My patch adds _SC_SIGSTKSZ_SOURCE.   There are no changes
>> > unless _SC_SIGSTKSZ_SOURCE is defined.
>>
>> OK, but do we have consensus on adding a new _*_SOURCE macro and a new
>> sysconf parameter ahead of their adoption by POSIX?  This is not a
>
> This is what Dave and I came up with.  This approach doesn't change ABI
> unless it is requested by developers.

Did you mean ABI?

I think we should use _GNU_SOURCE. We can add another feature macro if
it's adopted by POSIX.