[Bug c/13029] [3.4 Regression] static consts and -Wunused-variable

[mikpelinux at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13029

--- Comment #6 from Mikael Pettersson <mikpelinux at gmail dot com> ---
(In reply to Chengnian Sun from comment #4)
> May I ask what is the design rational of not warning unused static const
> variables?  

See PR28901.  There are cases of unused static const where the warning isn't
wanted, and so far the decision has been to favour those over the cases where
the warning _is_ wanted and would have detected real bugs.  Sigh.