[PATCH 3/9] scripts: Makefile.lib: Pass __UBOOT__ to DTC's CPP

[Simon Glass]

Hi Pierre-Clément,

On Wed, 16 Mar 2022 at 09:40, Pierre-Clément Tosi <ptosi at google.com> wrote:
>
> Some headers included (possibly indirectly) from .dts files might have
> U-Boot specific content relying on the __UBOOT__ macro passed to CPP
> when building C code. In that case, it would be sensible for DTC to see
> that content instead of the non-U-Boot one. To do so, pass the macro to
> the pre-processor when generate DTC inputs.

Can you give an example of such a situation?

>
> Signed-off-by: Pierre-Clément Tosi <ptosi at google.com>
> Cc: Simon Glass <sjg at chromium.org>
> ---
>  scripts/Makefile.lib | 1 +
>  1 file changed, 1 insertion(+)

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


>
> diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
> index c14da10de7..d7b548dce8 100644
> --- a/scripts/Makefile.lib
> +++ b/scripts/Makefile.lib
> @@ -192,6 +192,7 @@ dtc_cpp_flags  = -Wp,-MD,$(depfile).pre.tmp -nostdinc                    \
>                  -I$(srctree)/arch/$(ARCH)/include                       \
>                  -include $(srctree)/include/linux/kconfig.h             \
>                  -D__ASSEMBLY__                                          \
> +                -D__UBOOT__                                             \
>                  -undef -D__DTS__
>
>  # Finds the multi-part object the current object will be linked into
> --
> 2.35.1.723.g4982287a31-goog
>