[U-Boot] [PATCH V2 3/9] dts/Makefile: simplify dtc invocation

[Simon Glass]

On Mon, Jun 24, 2013 at 8:43 AM, Stephen Warren <swarren at wwwdotorg.org>wrote:

> From: Stephen Warren <swarren at nvidia.com>
> The invocation of dtc is significantly more complex that it could be,
> in order to work around an issue on old versions of dtc, which print
> a message to stdout every time they run.
>
> Remove this workaround, on the assumption that people have or will
> upgrade to a newer version of dtc. This simplifies the build rule
> significantly.
>
> Related, split the invocation of cpp and dtc into separate commands
> rather than a pipeline, so that if either fail, it is detected. This has
> the nice benefit of saving off the result of the pre-processing step,
> allowing it to be easily inspected.
>
> Assuming a new enough dtc (which an earlier patch enforces), dtc will
> parse #line directives in its input file, and generate correct file and
> line numbers in error messages, even though cpp is unconditionally
> applied to its input file.
>
> Signed-off-by: Stephen Warren <swarren at nvidia.com>
>

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