Building libstdc++-v3 and -WError

[Theodore Papadopoulo <Theodore dot Papadopoulo at sophia dot inria dot fr>]

I appreciate the concern of having the library free of any warnings,
but isn't -WError a little too hard...

Every time I tried to add --enable-libstdcxx-v3 lately when building gcc the 
compilation is aborted during libstdc++-v3. This time it's for some very
``stupid'' warning, 
that is even not of the responsibility of libstdc++-v3.
Basically the linux c library iswctype macro tests whether an unsigned in >=0
and warns that this is always true which is OK but aborts !! 

Would it be possible to remove -WError from the Makefile by 
restricting it to some maintainer mode, or maybe there is a better 
solution ? Most people cannot play with their system headers to avoid 
such things.

 	Thank's

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 Theodore Papadopoulo
 Email: Theodore.Papadopoulo@sophia.inria.fr Tel: (33) 04 92 38 76 01
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