Re: testing of CVS Autoconf

[Paul Eggert]

Ralf Wildenhues <address@hidden> writes:

> What would tar need?  The value of $ac_shiftbits and $ac_signbits
> as `#define's?

Only shiftbits.  C source code can compute signbits itself, with the
expression ((type) -1 < 0).

The tricky bit here is that ac_shiftbits is not always calculated, and
we don't want to calculate it if we don't need it, as it's expensive
to calculate.