Warnings about rcs_id strings: let's settle this

[Joe Buck]

On Fri, May 02, 2003 at 10:56:08AM -0700, Zack Weinberg wrote:
> Joe Buck <jbuck@synopsys.com> writes:
> 
> > only for const variables?  NO.  Many old codes do not declare the rcsid
> > const, and the fact that we have the flag that will warn about all unused
> > static variables means that users can still find them all.
> 
> My understanding of the message raising that concern was that unused
> non-const static variables were already covered by some other option.
> I don't have a strong opinion here.  I do think that enabling this
> warning at -Wextra is a good idea, as it is consistent with other
> "unused thing which may be hard to get rid of" warnings.

If previously released gcc's need the "const" to shut up, it's OK to keep
it that way.