Build tools

[M. Warner Losh]

In message: <20100626.172307.4959786928950356.imp at bsdimp.com>
            "M. Warner Losh" <imp at bsdimp.com> writes:
: Hey Ruslan,
: 
: Maybe you can help me understand why the following are in the
: buildtools list:
: _share= share/syscons/scrnmaps
: 
:     bin/csh \
:     lib/ncurses/ncurses \
:     lib/ncurses/ncursesw \
:     ${_share} \
:     lib/libmagic \
:     usr.sbin/sysinstall
: 
: There's clearly some side effects that I'm missing here...

I'm missing that build-tools: target is built, and that those tools
are then used to build these items.  It isn't that these items are
built themselves.

Warner