Building libstdc++-v3 and -WError

[Gabriel Dos Reis]

Benjamin Kosnik <bkoz@redhat.com> writes:

| > In the (what now seems ancient) GLIBCPP_ENABLE_DEBUG entry for acinclude.m4,
| > I wrote a comment, "Perhaps --enable-maintainer-mode should automatically
| > turn this on?".
| 
| indeed
| 
| Perhaps --enable-maintainer-mode should also turn on -Werror? I like that 
| approach too.

This strikes me as a good approximation of what we would like to have
in an ideal world. My vote is yes.

-- Gaby