From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-patches-return-412528-listarch-gcc-patches=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 44002 invoked by alias); 3 Nov 2015 16:10:45 -0000
Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-patches.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-patches/>
List-Post: <mailto:gcc-patches@gcc.gnu.org>
List-Help: <mailto:gcc-patches-help@gcc.gnu.org>
Sender: gcc-patches-owner@gcc.gnu.org
Received: (qmail 43993 invoked by uid 89); 3 Nov 2015 16:10:45 -0000
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=-2.2 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2
X-HELO: mail-lf0-f45.google.com
Received: from mail-lf0-f45.google.com (HELO mail-lf0-f45.google.com) (209.85.215.45) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-GCM-SHA256 encrypted) ESMTPS; Tue, 03 Nov 2015 16:10:41 +0000
Received: by lfgh9 with SMTP id h9so23512182lfg.1        for <gcc-patches@gcc.gnu.org>; Tue, 03 Nov 2015 08:10:37 -0800 (PST)
MIME-Version: 1.0
X-Received: by 10.25.77.17 with SMTP id a17mr8996254lfb.19.1446567037430; Tue, 03 Nov 2015 08:10:37 -0800 (PST)
Received: by 10.114.57.141 with HTTP; Tue, 3 Nov 2015 08:10:37 -0800 (PST)
In-Reply-To: <CAFiYyc0MUv4Rqa3nUoqr-8gishsWAXKfENZj4Ysqg-muvFCweg@mail.gmail.com>
References: <CAGWvnym=SO-wLDm+VKNPc2BJ20o8AOzpaRfkU1yFBsVLeQWhjA@mail.gmail.com>	<CAFiYyc0MUv4Rqa3nUoqr-8gishsWAXKfENZj4Ysqg-muvFCweg@mail.gmail.com>
Date: Tue, 03 Nov 2015 16:10:00 -0000
Message-ID: <CAGWvnymZL473VgitLQ5R3jAXb2JtspT=5FeeCNtjyd42fmAk0w@mail.gmail.com>
Subject: Re: [PATCH] PR 68192 Export AIX TLS symbols
From: David Edelsohn <dje.gcc@gmail.com>
To: Richard Biener <richard.guenther@gmail.com>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>
Content-Type: text/plain; charset=UTF-8
X-SW-Source: 2015-11/txt/msg00244.txt.bz2

On Tue, Nov 3, 2015 at 9:47 AM, Richard Biener
<richard.guenther@gmail.com> wrote:
> On Tue, Nov 3, 2015 at 3:23 PM, David Edelsohn <dje.gcc@gmail.com> wrote:
>> TLS symbols in AIX display a new, different symbol type in nm output.
>> Libtool explicitly creates a list of exported symbols for shared
>> libraries using nm and does not recognize the new TLS symbols, so
>> those symbols are not exported.
>>
>> This is a regression for TLS support on AIX.
>>
>> This patch updates libtool.m4 in GCC and configure for libstdc++-v3,
>> libgfortran, and libgomp.  I would like to apply the patch to GCC
>> while I simultaneously work with the Libtool community to correct the
>> bug upstream.  I also would like to backport this to GCC 5.2 and GCC
>> 4.9.x.
>
> What does this do to the set of exported symbols esp. on branches.
> Does AIX have library versions?

The patch restores symbols that were omitted by the "nm" change.  The
symbols are a superset of the current symbols and were present before,
which is why this is a regression.

Thanks, David