Hello,
On Thu, Jun 02, 2005 at 11:35:20PM -0700, Paul Eggert wrote:
> > It's documented that the builtin `unset' is non-portable, but what about
> > the use of unset variables vs. empty variables? Is this distinction
> > always meaningful?
>
> Yes.
let me add that the cache uses the distinction whether the variable is
set or not. (test "${ac_cv_foo+set}" = set)
> > Also, I know that ${var:-default} is not portable. Is
> > ${var-default}?
>
> Yes.
And also
test "${ac_cv_foo+set}" = set
which is used by the caching mechanism.
Have a nice day,
Stepan
_______________________________________________
Autoconf mailing list
Autoconf@xxxxxxx
http://lists.gnu.org/mailman/listinfo/autoconf
