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SubjectRe: [PATCH] kbuild: Add DTC_CPP_FLAGS
(+CC: DT maintainers)

On Wed, Dec 18, 2019 at 8:55 PM Frank Wunderlich
<frank-w@public-files.de> wrote:
>
> With this Patch we are able to change cpp-preprocessor options
> (e.g. -D...) for using conditions (#ifdef) in devicetree files
> and dynamically add include searchpaths

I think this is questionable
since DT is supposed to describe hardware.
Does it depends on #ifdef or some external defines?

If you want to add variations,
you can add a new DTS which includes other DTS(I) files.



>
> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
> ---
> scripts/Makefile.lib | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
> index 3fa32f83b2d7..c722a6c7786a 100644
> --- a/scripts/Makefile.lib
> +++ b/scripts/Makefile.lib
> @@ -177,7 +177,7 @@ DTC_INCLUDE := $(srctree)/scripts/dtc/include-prefixes
>
> dtc_cpp_flags = -Wp,-MD,$(depfile).pre.tmp -nostdinc \
> $(addprefix -I,$(DTC_INCLUDE)) \
> - -undef -D__DTS__
> + -undef -D__DTS__ $(DTC_CPP_FLAGS)
>
> # Useful for describing the dependency of composite objects
> # Usage:
> --
> 2.17.1
>


--
Best Regards


Masahiro Yamada

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