Re: [PATCH] KBuild: silence "'scripts/unifdef' is up to date."

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On Mon, 14 Mar 2011 23:34:25 -0700, Mike Waychison wrote:

> Patch applies to 2.6.38-rc8.
> 
> While changing our build system over to use the headers_install target
> as part of our klibc build, the following message started showing up in
> our logs:
> 
> make[2]: `scripts/unifdef' is up to date.
> 
> It turns out that the build blindly invokes a recursive make on this
> target, which causes make to emit this message when the target is
> already up to date.  This isn't seen for most targets as the rest of the
> build relies primarily on the default target and on PHONY targets when
> invoking make recursively.
> 
> Silence the above message when building unifdef as part of
> headers_install by hiding it behind a new PHONY target called
> "build_unifdef" that has an empty recipe.
> 
> Signed-off-by: Mike Waychison <mikew@xxxxxxxxxx> ---

Acked-by: WANG Cong <xiyou.wangcong@xxxxxxxxx>

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