[build, doc, v3] Support Sun symbol versioning in libstdc++-v3, rev. 2

[Rainer Orth]

IainS <developer@sandoe-acoustics.co.uk> writes:

>> On the other hand, that script should only be used if
>> LIBSSP_USE_SYMVER_SUN, which has no business being defined on Darwin.
>
> indeed .

That's bad.  I suppose the Darwin ld either silently accepts/ignores -M
or it has a different meaning there which happens to have no ill effect.

>> Could you please check the configure output for `whether symbol
>> versioning is supported'?  It should be no on Darwin.  Otherwise, please
>> have a look at libssp/config.log to see what's going on there.
>
> bootstrap is running with 161706, do I need to apply the patch at:
> http://gcc.gnu.org/ml/gcc-patches/2010-07/msg00131.html

Shouldn't be necessary since Darwin has no GNU-style symbol versioning,
AFAIK.

	Rainer

-- 
-----------------------------------------------------------------------------
Rainer Orth, Center for Biotechnology, Bielefeld University