Re: warnings compiling Emacs 22 on amd64

[Francesco Potorti`]

>But since this warning is about something which is not itself a bug, either
>gcc provides a way to annotate the code to indicate that this is not a bug
>(like the use of double-parens to turn off the warning about assignment in
>an `if'), or there's not much we can do about it (other than try to work
>around it by making the code ugly, less robust, and maybe even less
>efficient: after all the warning here is output specifically when gcc finds
>an optimization).

First I tried to work around it by making the code slightly more
complex, but still clear.  However, I failed.

I looked at the gcc 4.1 info page, and I found no warnings to turn off
that are specific for this case (I looked for the string "compar").

As far as code annotations are concerned, I don't know where to look: I
had never heard of the double parenthesis trick, nor was I able to find
it in the gcc info page.