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

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