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From: "PHHargrove at lbl dot gov" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/49379] warning from Mac OS X linker alignment lost for -ftree-vectorize optimization
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49379

Paul H. Hargrove <PHHargrove at lbl dot gov> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |PHHargrove at lbl dot gov

--- Comment #6 from Paul H. Hargrove <PHHargrove at lbl dot gov> 2011-06-29 05:27:36 UTC ---
Following up on my previous comment, I've repeated the experiment w/ a system
with more recent binutils.  The result is the same:


$ /tmp/gcc-4.7-20110625/host-x86_64-unknown-linux-gnu/gcc/xgcc
-B/tmp/gcc-4.7-20110625/host-x86_64-unknown-linux-gnu/gcc -O3 bug49379-2_main.c
bug49379-2_aux.c
/usr/bin/ld: Warning: alignment 4 of symbol `flag' in /tmp/ccIvQMTp.o is
smaller than 16 in /tmp/ccP5ZCFr.o

$ /tmp/gcc-4.7-20110625/host-x86_64-unknown-linux-gnu/gcc/xgcc
-B/tmp/gcc-4.7-20110625/host-x86_64-unknown-linux-gnu/gcc -O3
-fno-tree-vectorize bug49379-2_main.c bug49379-2_aux.c


$ ld --version
GNU ld (GNU Binutils for Ubuntu) 2.20
Copyright 2009 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later version.
This program has absolutely no warranty.

$ uname -a
Linux ftg4 2.6.31-16-generic #53-Ubuntu SMP Tue Dec 8 04:02:15 UTC 2009 x86_64
GNU/Linux

$ cat /etc/*release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=9.10
DISTRIB_CODENAME=karmic
DISTRIB_DESCRIPTION="Ubuntu 9.10"