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Re: [PATCH] change GLIBC PPC64/ELF2 ABI default to 2.17
- From: Steven Munroe <munroesj at linux dot vnet dot ibm dot com>
- To: Andreas Schwab <schwab at linux-m68k dot org>
- Cc: munroesj at us dot ibm dot com, Andreas Jaeger <aj at suse dot com>, Adam Conrad <adconrad at 0c3 dot net>, "Carlos O'Donell" <carlos at redhat dot com>, libc-alpha at sourceware dot org, Adhemerval Zanella <azanella at linux dot vnet dot ibm dot com>
- Date: Thu, 30 Jan 2014 09:55:44 -0600
- Subject: Re: [PATCH] change GLIBC PPC64/ELF2 ABI default to 2.17
- Authentication-results: sourceware.org; auth=none
- References: <1391008726 dot 16702 dot 105 dot camel at spokane1 dot rchland dot ibm dot com> <52EA5D7A dot 9000903 at suse dot com> <1391095043 dot 16702 dot 200 dot camel at spokane1 dot rchland dot ibm dot com> <87wqhhijbr dot fsf at igel dot home>
- Reply-to: munroesj at us dot ibm dot com
On Thu, 2014-01-30 at 16:24 +0100, Andreas Schwab wrote:
> Steven Munroe <munroesj@linux.vnet.ibm.com> writes:
>
> > yes the 2.18 and 2.17 back ports must have forward compatible with
> > GLIBC-2.19, which the normal requirement. I and not asking for change to
> > the GLIBC-2.19 ABI. I am asking to change the GLIBC DEFAULT symbol for
> > the new PPC64LE platform to be 2.17.
>
> But you _are_ changing the GLIBC 2.19 ABI. Changing the baseline will
> *remove* all versioned symbols from the old baseline that didn't receive
> a new version in between.
>
We are not change the current Big Endian ABI which must include symbols
back to GLIBC-2.3. That ABI continues unchanged.
Look at the patch:
powerpc64-.*-linux.* libpthread=0 GLIBC_2.3
-powerpc.*le-.*-linux.* libpthread=0 GLIBC_2.18
+powerpc.*le-.*-linux.* libpthread=0 GLIBC_2.17
The current PPC64 BE ABI is not changing.
Do you object to the current state where DEFAULT is GLIBC-2.18. Are your
suggesting we disallow Adam's port? If not why would you object to
allowing Carlos' port? And debian, Fedora, and ...
We are only changing this for the PPC64 Little endian ELF2 ABI. We
should remove most of the old compatibility symbols from before what
ever we agree the new "year zero" should be.
We only debating the "year zero" Default version for an new ABI for a
new platform.