[U-Boot] [PATCH] Pass empty CFLAGS on invocation of libfdt/setup.py

[Tom Rini]

On Thu, Mar 16, 2017 at 11:38:00AM -0700, Max Filippov wrote:

> When building u-boot tools in cross-build environment CFLAGS environment
> variable set up for target is taken into an account when building code
> for host. Set it to empty on invocation of python.
> 
> This fixes the following build errors when cross-compiling for xtensa:
> 
>   cc1: error: unrecognized command line option "-mlongcalls"
>   cc1: error: unrecognized command line option "-mauto-litpools"
> 
> Signed-off-by: Max Filippov <jcmvbkbc at gmail.com>
> ---
>  tools/Makefile | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/tools/Makefile b/tools/Makefile
> index 1c840d7..c224e8a 100644
> --- a/tools/Makefile
> +++ b/tools/Makefile
> @@ -120,7 +120,7 @@ _libfdt.so-sharedobjs += $(LIBFDT_OBJS)
>  libfdt:
>  
>  tools/_libfdt.so: $(patsubst %.o,%.c,$(LIBFDT_OBJS)) tools/libfdt_wrap.c
> -	LDFLAGS="$(HOSTLDFLAGS)" python $(srctree)/lib/libfdt/setup.py \
> +	LDFLAGS="$(HOSTLDFLAGS)" CFLAGS="" python $(srctree)/lib/libfdt/setup.py \

I think we need to be passing in HOSTCFLAGS or we'll end up being broken
on certain other cases (which are broken today I suspect).  Can you test
that out?  Thanks!

-- 
Tom
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