Problem with `string', threading and shared libraries.

[Benjamin Kosnik]

> Good point.  I'll add --enable-version-specific-libs to my autobuilder.

good place to start. If this can also make the include directory clear 
for newbies, the world will be a better place...

> > I really think the symbol versioning is just as important though. 
> 
> Absolutely.  I'm thinking something along the lines of libgcc-std.ver
> and libgcc.map.  Is that the goal?

exactly.