[Bug ld/12944] GNU LD incorrectly optimize away COMDAT sections refered from data sections.

[hjl.tools at gmail dot com]

http://sourceware.org/bugzilla/show_bug.cgi?id=12944

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> 2011-06-28 14:12:59 
UTC ---
Works for me:

address@hidden pr12944]$ make
/export/build/gnu/gcc/build-x86_64-linux/gcc/../../release/usr/gcc-4.7.0/bin/g++
-O2 -flto -fuse-linker-plugin -flto-partition=none   -c -o x.o x.cc
/export/build/gnu/gcc/build-x86_64-linux/gcc/../../release/usr/gcc-4.7.0/bin/g++
-O2 -flto -fuse-linker-plugin -flto-partition=none -B./ -o x x.o
./x
A
B
nm x | grep _ZTV1
0000000000400700 r _ZTV1A
0000000000400720 r _ZTV1B
address@hidden pr12944]$ gdb x
GNU gdb (GDB) 7.3.50.20110609-cvs
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-unknown-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /export/home/hjl/bugs/binutils/lto-5/pr12944/x...(no
debugging symbols found)...done.
$1 = (void *) 0x0
$2 = (void *) 0x400760
$3 = (void *) 0x4005f0
$4 = (void *) 0x0
$5 = (void *) 0x400740
$6 = (void *) 0x4005e0
address@hidden pr12944]$ cat .gdbinit 
p ((void **)0x400700)[0]
p ((void **)0x400700)[1]
p ((void **)0x400700)[2]
p ((void **)0x400720)[0]
p ((void **)0x400720)[1]
p ((void **)0x400720)[2]
quit
address@hidden pr12944]$

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