Adding new gcc warnings

[Russ Allbery]

Russ Allbery <eagle at eyrie.org> writes:

>> Couldn't -Wstack-protector along with -fstack-protector be useful?

> Added these to rra-c-util.

I take that back -- I apparently looked at this a while back and realized
it wouldn't be workable due to false positives with small buffers.

-- 
Russ Allbery (eagle at eyrie.org)              <http://www.eyrie.org/~eagle/>

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