[U-Boot] confused ... how do some CONFIG settings "implicitly" set others?

[Robert P. J. Day]

  reading http://www.denx.de/wiki/view/DULG/UBootSplashScreen, and i
see:

"To enable splash screen support, you have to add a "#define
CONFIG_SPLASH_SCREEN" to your board configuration file. This will also
implicitly enable U-Boot Bitmap Support."

  "implicitly"?  how does that work?  from what i can see in
define2mk.sed, the transformation is straightforward and there are no
dependencies or selects as in the kernel Kconfig structure.  how does
setting splash screen implicitly set bitmap support?  what am i
missing?

rday
--

========================================================================
Robert P. J. Day                               Waterloo, Ontario, CANADA

            Linux Consulting, Training and Kernel Pedantry.

Web page:                                          http://crashcourse.ca
Twitter:                                       http://twitter.com/rpjday
========================================================================