[Bug c/79677] Weird handling of -Werror=

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79677

--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
For the theory of how I think this should behave, see 
<https://gcc.gnu.org/ml/gcc-patches/2012-05/msg00419.html> (referring back 
to <https://gcc.gnu.org/ml/gcc-bugs/2012-04/msg02134.html> and 
<https://gcc.gnu.org/ml/gcc/2010-01/msg00063.html> for the concept of 
distance for options overriding each other).  That is, 
-Werror=format-security should act like a -Wformat-security variant, and 
so all these examples should warn/error.

I don't know what the immediate cause of this issue or appropriate fix in 
the context of the present implementation might be.