Re: warnings compiling Emacs 22 on amd64

[Stefan Monnier]

>     #define FIXNUM_OVERFLOW_P(i) \
>       ((EMACS_INT)(int)(i) > MOST_POSITIVE_FIXNUM \
>        || (EMACS_INT)(int)(i) < MOST_NEGATIVE_FIXNUM)

This would break code where `i' is a long.

In any case, the first thing to do is to bring it to the attention of the
gcc maintainers.  Even if they don't provide any workaround, it's important
that they know about such problems.  Otherwise they may be tempted to add
warnings for code like

         int x = 3;
         int y = SOME_MACRO (x);

         if (y > 6) ...

where SOME_MACRO may end up just returning `x' depending on some
compilation flag.


        Stefan