Re: glibc 2.34 - Hard ABI freeze effective immediately.

["H.J. Lu" <hjl.tools@gmail.com>]

On Mon, Jul 26, 2021 at 7:29 AM Carlos O'Donell <carlos@redhat.com> wrote:
>
> On 7/25/21 3:46 PM, H.J. Lu wrote:
> > On Sun, Jul 18, 2021 at 7:16 PM Carlos O'Donell via Libc-alpha
> > <libc-alpha@sourceware.org> wrote:
> >>
> >> On 7/4/21 10:43 PM, Carlos O'Donell wrote:
> >>> We are in slushy freeze right now. I'm reviewing the last of the ABI
> >>> changes we want to make in glibc 2.34.
> >>
> >> The ABI freeze is now hard freeze, I would like to avoid any further ABI
> >> changes that are not on this list.
> >>
> >> If you have an ABI change please reach and respond to this thread
> >> immediately with the request.
> >>
> >> I would like to spend this week and next fixing any remaining bugs
> >> and doing machine testing.
> >>
> >>> The ABI changes that are currently under review:
> >>>
> >>> - Move nss_dns into libc.
> >>> https://patchwork.sourceware.org/project/glibc/list/?series=2407
> >>
> >> I have reviewed v2 and I think it should be included in 2.34.
> >>
> >> I have just reviewed the final v3 changes so this should go in on Monday.
> >>
> >>> - Remove malloc hooks.
> >>> https://patchwork.sourceware.org/project/glibc/list/?series=2406
> >>
> >> I have reviewed v8 and I think it should be included in 2.34.
> >>
> >> I'll review a v9 for inclusion.
> >>
> >>> - nss_files move.
> >>> https://patchwork.sourceware.org/project/glibc/list/?series=2386
> >>
> >> This was reviewed by Adhemerval and committed July 7th.
> >>
> >>> - Add close_range, closefrom, and posix_spawn_file_actions_closefrom_np
> >>> https://patchwork.sourceware.org/project/glibc/list/?series=2363
> >>
> >> This was committed by Adhemerval on July 8th.
> >>
> >>> - Define PTHREAD_STACK_MIN to sysconf(_SC_THREAD_STACK_MIN)
> >>> https://patchwork.sourceware.org/project/glibc/list/?series=2345
> >>
> >> I have reviewed this, and it was committed by HJ on July 9th.
> >>
> >>> - x86: Install <bits/platform/x86.h> [BZ #27958]
> >>> https://patchwork.sourceware.org/project/glibc/list/?series=2272
> >>
> >> I have reviewed this and requested some changes.
> >>
> >> I have reviewed this again and I am discussing the final wording with HJ.
> >>
> >> I think this should be included in glibc 2.34 and we will get there.
> >>
> >> --
> >> Cheers,
> >> Carlos.
> >>
> >
> > It was a mistake to export _r_debug from ld.so:
> >
> > https://sourceware.org/bugzilla/show_bug.cgi?id=28130
> >
> > I'd like to deprecate _r_debug in glibc 2.34 and replace it with:
> >
> > /* Return the address of that structure used by the dynamic linker.  */
> > extern struct r_debug * __r_debug_location (void) __attribute_const__;
> > #define _r_debug (*__r_debug_location ())
> >
> > so that I can extend struct r_debug for libraries loaded with dlmopen:
> >
> > https://gitlab.com/x86-psABIs/Linux-ABI/-/issues/2
>
> This needs more review, and is too late for glibc 2.34.
>
> I'm happy to review the situation once we open glibc 2.35.
>
> I think that fixing _r_debug and discussing dlmopen will take several
> weeks to achieve consensus and review existing best practice and
> patches.
>
> Do you have a strong objection to waiting for glibc 2.35?
>

2.35 is OK.

Thanks.

-- 
H.J.