[U-Boot] [PATCH] dts/Makefile: Turn off system-/gcc-specific predefined macros

Wolfgang Denk
2012-08-10T21:50:41Z

Dear Horst Kronstorfer,

In message <1342184620-31448-1-git-send-email-hkronsto@frequentis.com> you wrote:
> Add '-undef' to DTS_CPPFLAGS to avoid unwanted expansion of dts content
> that matches system-specific or gcc-specific predefined macros.
>
> Example: A number of PowerPC related *.dts files in the kernel define a
> property named 'linux,network-index' which (w/o '-undef') is expanded to
> '1,network-index' by the preprocessor because of '#define linux 1.'
>
> With '-undef' in place only the standard predefined macros are visible:
>
> $ gcc -dM -E -undef - </dev/null
> #define __STDC_HOSTED__ 1
> #define __STDC__ 1
>
> Signed-off-by: Horst Kronstorfer <hkronsto@frequentis.com>
> ---
> dts/Makefile | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)

Applied, thanks.

Best regards,

Wolfgang Denk

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