[U-Boot] [PATCH 1/2] Makefile: use if_change_dep for u-boot.cfg

[Simon Glass]

On 19 September 2016 at 12:20, Stephen Warren <swarren at wwwdotorg.org> wrote:
> From: Stephen Warren <swarren at nvidia.com>
>
> cmd_cpp_cfg generates a dependency output, but because it's invoked using
> if_changed rather than if_changed_dep, that dependency file is ignored.
> This results in Kbuild not knowing about which files u-boot.cfg depends
> on, so it may not be rebuilt when required.
>
> A practical result of this is that u-boot.cfg may continue to reference
> CONFIG_ options that no longer exist in the source tree, and this can
> cause the adhoc config options check to fail.
>
> This change modifies Makefile to use if_changed_dep, which in turn causes
> all dependencies to be known to the next make invocation.
>
> Signed-off-by: Stephen Warren <swarren at nvidia.com>
> ---
>  Makefile             | 2 +-
>  scripts/Makefile.spl | 2 +-
>  2 files changed, 2 insertions(+), 2 deletions(-)

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