[U-Boot] [U-Boot, v2, 2/3] cmd: add a new command "config" to show .config contents

[Tom Rini]

On Mon, Jan 30, 2017 at 11:12:07AM +0900, Masahiro Yamada wrote:

> This feature is inspired by /proc/config.gz of Linux.  In Linux,
> if CONFIG_IKCONFIG is enabled, the ".config" file contents are
> embedded in the kernel image.  If CONFIG_IKCONFIG_PROC is also
> enabled, the ".config" contents are exposed to /proc/config.gz.
> Users can do "zcat /proc/config.gz" to check which config options
> are enabled on the running kernel image.
> 
> The idea is almost the same here; if CONFIG_CMD_CONFIG is enabled,
> the ".config" contents are compressed and saved in the U-Boot image,
> then printed by the new command "config".
> 
> The usage is quite simple.  Enable CONFIG_CMD_CONFIG, then run
>  > config
> from the command line interface.  The ".config" contents will be
> printed on the console.
> 
> This feature increases the U-Boot image size by about 4KB (this is
> mostly due to the gzip-compressed .config file).  By default, it is
> enabled only for Sandbox because we do not care about the memory
> footprint on it.  Of course, this feature is architecture agnostic,
> so you can enable it on any board if the image size increase is
> acceptable for you.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

Applied to u-boot/master, thanks!

-- 
Tom
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