Synth and circular dependencies

[Don Lewis]

On 23 Aug, Thomas Mueller wrote:

> But it seems more cumbersome with "make PORT_DBDIR=... showconfig"
> than with "make show-options" and "make show depends-options" in
> NetBSD with pkgsrc.  Or maybe I'm spoiled?

PORT_DBDIR= only needs to be specified if you want to point to somewhere
other than the default location.  Otherwise just "make showconfig" will
suffice.