Automatically generate symlinks for virtual categories.

[Vitaly Magerya]

On 06/06/2009, Ion-Mihai Tetcu <itetcu at freebsd.org> wrote:
> Did you test what happens with all this idea when a port has a
> .include "${CURDIR}......"
> ?

When running the script uses $(make <opts> -C<port-directory>),
which in effect is $(cd <port-directory> && make <opts>), so
including current directory works fine when symlinks are generated.

When actually installing the port from a symlink,
the current directory is reported to be the original, not the symlink.
So it should work. I've tried a few ports with .include ${CURDIR..},
there seems to be no problems.