From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-394734-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 4283 invoked by alias); 20 Jun 2012 13:25:59 -0000
Received: (qmail 4271 invoked by uid 22791); 20 Jun 2012 13:25:58 -0000
X-SWARE-Spam-Status: No, hits=-4.3 required=5.0	tests=ALL_TRUSTED,AWL,BAYES_00,KHOP_THREADED
X-Spam-Check-By: sourceware.org
Received: from localhost (HELO gcc.gnu.org) (127.0.0.1)    by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Wed, 20 Jun 2012 13:25:46 +0000
From: "dje at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/52887] Bootstrap on AIX failure: Undefined symbol: .std::function<void (std::__regex::_PatternCursor const&, std::__regex::_Results&)>::function(std::function<void (std::__regex::_PatternCursor const&, std::__regex::_Results&)> const&)
Date: Wed, 20 Jun 2012 13:25:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: bootstrap
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: dje at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Changed-Fields:
Message-ID: <bug-52887-4-3P5C7qY8em@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-52887-4@http.gcc.gnu.org/bugzilla/>
References: <bug-52887-4@http.gcc.gnu.org/bugzilla/>
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
Content-Type: text/plain; charset="UTF-8"
MIME-Version: 1.0
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
X-SW-Source: 2012-06/txt/msg01361.txt.bz2

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52887

--- Comment #17 from David Edelsohn <dje at gcc dot gnu.org> 2012-06-20 13:25:31 UTC ---
Another feature of AIX is its garbage-collecting linker. The very first
implementation of GCC for AIX was forced to emit an extra symbol to tie the
text section to the data section to prevent the linker from garbage collecting
a related section that did not have an obvious reference. This introduces an
extra dependency and may pull in unreferenced data sections from object files.
libstdc++ is built with --function-sections and --data-sections, which should
minimize this, but, again, if an application is relying upon the linker to
ignore missing definitions of symbols, it may behave differently on AIX.