[RFC PATCH 2/4] linux/kconfig.h: simplify logic for choosing CONFIG_{SPL_, TPL_, }*

[Simon Glass]

On Fri, 12 Jun 2020 at 05:02, Rasmus Villemoes
<rasmus.villemoes at prevas.dk> wrote:
>
> Instead of using the arg1_or_junk trick to pick between two choices,
> with a bit of duplication between the branches (and most of the
> CONFIG_TPL_BUILD case being redundant, as _IS_TPL is known to be
> defined to 1 in that case), simply define a prefix that we inject
> between CONFIG_ and the given config symbol.
>
> This only requires one level of indirection (to get the
> _CONFIG_PREFIX macro expanded before the token concatenation takes
> place), and makes it easy to, say, introduce a CONFIG_HOSTTOOL_
> prefix. [I would expect most HOSTTOOL_ symbols to just be def_bool y,
> but it would allow us to clean up some of the ifdef HOSTCC mess in the
> sources shared between U-Boot and host tools.]
>
> Signed-off-by: Rasmus Villemoes <rasmus.villemoes at prevas.dk>
> ---
>  include/linux/kconfig.h | 27 ++++++++-------------------
>  1 file changed, 8 insertions(+), 19 deletions(-)
>

Reviewed-by: Simon Glass <sjg at chromium.org>