[U-Boot] nand spl build with wrong CONFIG_SYS_TEXT_BASE

[Scott Wood]

On Tue, 9 Nov 2010 18:18:53 +0100
Wolfgang Denk <wd at denx.de> wrote:

> Dear Scott Wood,
> 
> In message <20101109102643.45d7f398 at udp111988uds.am.freescale.net> you wrote:
> >
> > > Maybe they should use different variables then, say
> > > CONFIG_SYS_TEXT_BASE and CONFIG_SYS_TEXT_BASE_SPL ?
> > 
> > Why?  It's the same variable, just for a different build.  Are we going
> > to have _SPL and non-_SPL variants of all other things that might vary
> > between the two?
> 
> This is a multistage process. Initially, we generate autoconf.mk by
> parsing the config files; then we include autoconf.mk in the Makefile
> to export the settings to make.  If you change the value of one of the
> variables in a later stage of the build (like using #ifdef), then tis
> will not become visible in the Makefile context, i. e. any use of
> these variables for example in the Linker command will still use the
> old value.
> 
> > What about a middle-stage build where we want to use CONFIG_ symbols to
> > pull in files like a regular U-Boot build, but we want to pull in a
> > different set than the final image?
> 
> This is no problem as long as these variables doen't change their
> values on the fly.

It's not "on the fly", it's just that each image needs its own
autoconf.mk.

-Scott