Re: restrict AC_CONFIG_LIBOBJ_DIR

[Paul Eggert]

Stepan Kasal <address@hidden> writes:

> I wanted to implement this:
>
> 1) the string can contain only characters -.a-zA-Z_0-9/
> 2) the first character is not /

In that case your regular expression is right.  You also implemented a
3rd restriction "the string must be nonempty" but that's also a POSIX
requirement so it's fine to check this too.

> (Yes, I think path of ../../build-aux can make sense, if the configure
> belongs to a subpackage.)

In that case, why not allow absolute file names too?

Sorry, I'm lost.  Why is it important to restrict the file name
choices here?