making use of --dynamic-list-cpp-typeinfo

[Maksim Orlovich]

>
> Hi,
>
> since about a week, the GNU binutils have gained support for reducing
> intra-shared lib relocation overhead. Via a special flag, you can ask the
> linker to resolve relocations any uninteresting or only a certain set of
> symbols always internally. This is a significant gain for C++, where you
> normally don't make use of LD_PRELOAD's that overwrite C++ mangled
> symbols.

Hi Dirk. Sounds pretty cool, but if you put it in, could you please make
it easy to disable, since testregression plays a lot of symbol interposing
tricks?

Thanks,
Maks