[U-Boot] [PATCH] config.mk: Add -Wundef to CFLAGS

[Albert ARIBAUD]

Hi Masahiro,

On Tue, 30 Jul 2013 11:57:05 +0900, Masahiro Yamada
<yamada.m at jp.panasonic.com> wrote:

> In U-boot source, some '#if' directives evaluate
> undefined identifiers.
> 
> To find and fix them, this commit adds -Wundef to CFLAGS.
> 
> Signed-off-by: Masahiro Yamada <yamada.m at jp.panasonic.com>
> ---
>  config.mk | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/config.mk b/config.mk
> index f71e145..7a92ae3 100644
> --- a/config.mk
> +++ b/config.mk
> @@ -259,7 +259,7 @@ CPPFLAGS += -I$(TOPDIR)/include
>  CPPFLAGS += -fno-builtin -ffreestanding -nostdinc	\
>  	-isystem $(gccincdir) -pipe $(PLATFORM_CPPFLAGS)
>  
> -CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes
> +CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wundef
>  
>  ifdef BUILD_TAG
>  CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"'

Will the patch cause some targets to break? If so, then I personally
would prefer that fixes be provided for at least the trivial cases.

Amicalement,
-- 
Albert.