[RFC] : Compiling libstdc++ with warnings on

[Benjamin Kosnik]

> 1) There are a small number of bugs in the testsuite headers (all
> functions without a return statement which don't return void)

These should be fixed.

> 2) A large number of "unused variables" in various tests (easy to fix
> with the unused attribute).

Usually this is the bool test thing, but sometimes you can just
simplify or remove arguments, etc. More specifics would help here....
can you post a list from the test results?

-benjamin