Re: Rename -W to -Wextra ?

[Phil Edwards <phil at jaj dot com>]

On Mon, Jun 03, 2002 at 11:52:28AM +0100, Joseph S. Myers wrote:
> On Mon, 3 Jun 2002, Phil Edwards wrote:
> 
> > (I've been finding all the things that -W controls right now, and will
> > update the manual.  I'll probably need some help coming up with example
> > code that triggers the warning.)
> 
> Can you split -W into separate options for the separate things it
> controls, the way -Wall is just the union of such separate options?

Well, I /can/, but I don't think it's a good idea.  Do we really want that
many new -W* options?

The manual currently lists 10 things warned about by -W.  One of them has
been moved into its own option already, but the manual wasn't updated.
I've found another 5 undocumented uses in the C-family group, and an
additional 6 in C++.  The only occurances of extra_warnings (the variable
in question) in Chill and Objective-C were in deleted files.  None in Java,
and I haven't looked at Ada (and since I can't build it, don't much plan to).

That's 20 separate options.  And remember that they are for corner cases, so
we'd end up with -Wunsigned-compared-against-zero-with-< and -Wempty-if-body
and -Wsubscripting-an-array-declared-as-register...

The idea of a single option to warn about "oddball things which are usually
suspect, but not always" makes sense to me.  It's just the spelling that
GCC got wrong.


Phil

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