[libstdc++] Add --disable-hosted-libstdcxx, clean up conditionals

[Phil Edwards]

On Thu, Aug 28, 2003 at 10:01:13PM +0200, Gabriel Dos Reis wrote:
> 
> "-" is translated to "_".  "+" could just be translated to  "x".

But not by us.  Those things happen /inside/ autoconf.

If you can persude the autoconf maintainers to make this change, then sure,
we can have a "++" layer of compatibility.

-- 
Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it.
    - Brian W. Kernighan