[Bug lto/48947] 4.6.0 fails to link ffmpeg with LTO and gold

["rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48947

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |iant at google dot com

--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-05-12 08:51:25 UTC ---
(In reply to comment #4)
> I checked those errors with both binutils 2.21 release and 2.22 CVS (10th of
> May).
> 
> 
> gcc -###
> Using built-in specs.
> COLLECT_GCC=/???/x86_64-gcc-4.6.0/bin/gcc
> COLLECT_LTO_WRAPPER=/???/x86_64-gcc-4.6.0/libexec/gcc/x86_64-unknown-linux-gnu/4.6.0/lto-wrapper
> Target: x86_64-unknown-linux-gnu
> Configured with: ../configure --prefix=/???/x86_64-gcc-4.6.0 --enable-shared
> --with-arch=native --enable-languages=c,c++ --enable-lto --enable-plugin
> --enable-gold --enable-linker-build-id --disable-multilib --enable-ld=default
> --with-plugin-ld=ld.gold
> Thread model: posix
> gcc version 4.6.0 (GCC)
> 
> If you mean CC=gcc -flto -fuse-linker-plugin, I get the same errors.

With "using GNU ld" I mean configuring with --with-plugin-ld=ld.bfd
(or omitting that configure option).

I'm CCing a gold expert, maybe he can shed some light on that error.  I suppose
all object files _are_ built with -fPIC (eventually LTO takes some symbols
local by making them have hidden visibility - can that cause issues?).