RFC --enable-debugging

[Gabriel Dos Reis]

Benjamin Kosnik <bkoz@redhat.com> writes:

| ...builds libstdc++.so twice. Once as-is, once for debugging. Debugging
| options can include CXXFLAGS="-g -O0", perhaps a change to use
| malloc-alloc allocators, and perhaps --enable-concept-checks.
| 
| Installed in $prefix/lib/debug/
| 
| Thoughts?

How does a naive user (me) easily tell the compiler to look at the
"right" place without having to experience unspeakable headache? :-)

-- Gaby