On Sat, Jul 4, 2020 at 12:38 AM Simon Glass <s...@chromium.org> wrote: > > From: Rasmus Villemoes <rasmus.villem...@prevas.dk> > > This adds a bunch of preprocessor magic to extend the capabilities of > CONFIG_IS_ENABLED. The existing semantics of > > CONFIG_IS_ENABLED(FOO) > > expanding to a 1 or 0 (depending on build context and the defined-ness > or not of the appropriate CONFIG_FOO/CONFIG_SPL_FOO/CONFIG_TPL_FOO) > are of course preserved. With this, one is also allowed a two-argument > form > > CONFIG_IS_ENABLED(FOO, (something)) > > which expands to something precisely when CONFIG_IS_ENABLED(FOO) would > expand to 1, and expands to nothing otherwise. It is, in other words, > completely equivalent to the three lines > > #if CONFIG_IS_ENABLED(FOO) > something > #endif > > The second argument must be parenthesized in order to allow any > tokens, including a trailing comma, to appear - one use case for this > is precisely to make it a bit more ergonomic to build an array and > only include certain items depending on .config. That should increase > both readability and not least "git grep"ability. > > A third variant is also introduced, > > CONFIG_IS_ENABLED(FOO, (xxx), (yyy)) > > which corresponds to > > #if CONFIG_IS_ENABLED(FOO) > xxx > #else > yyy > #endif > > Signed-off-by: Rasmus Villemoes <rasmus.villem...@prevas.dk> > Reviewed-by: Simon Glass <s...@chromium.org> > Signed-off-by: Simon Glass <s...@chromium.org> > --- > > (no changes since v1) > > include/linux/kconfig.h | 48 ++++++++++++++++++++++++++++++++++++++--- > 1 file changed, 45 insertions(+), 3 deletions(-) >
applied to u-boot-x86, thanks!
