> > Is that a bug or a featuer?
>
> Neither. It is simply that --disable-whatever is equivalent to
> --enable-whatever=no, so that giving it an option is in fact
> useless.
>
> > I cannot see why you'd want to use --disable-FOO=yes/no.... Can
> > someone explain why that is useful?
>
> Given what I said above, it is not.
it is useful if you can make use of it! because the configure
--help output displays most options the --disable way,
middle-clicking that and appending a no is faster and less work
than writing it all manually the --enable way. it is also less
error prone.
./configure --enable-{a,b,c} --disable-{d,e,f}
