linux-kernel - Re: [PATCH 04/26] kbuild: introduce $(kecho) convenience echo

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Date:	Mon, 22 Dec 2008 10:49:12 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	kbuild <linux-kbuild@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	Mike Frysinger <vapier@...too.org>
Subject: Re: [PATCH 04/26] kbuild: introduce $(kecho) convenience echo

On Sat, 20 Dec 2008 15:31:15 +0100 Sam Ravnborg wrote:

> From: Mike Frysinger <vapier@...too.org>
> 
> There is a bunch of places in the build system where we do 'echo' to show
> some nice status lines.  This means we still get output when running in
> silent mode.  So declare a new KECHO variable that only does 'echo' when we
> are in a suitable verbose build mode.
> 
> Signed-off-by: Mike Frysinger <vapier@...too.org>
> [sam: added Documentation]
> Signed-off-by: Sam Ravnborg <sam@...nborg.org>

Hi,
Just nits/clarifications (below).


> ---
>  Documentation/kbuild/makefiles.txt |   14 ++++++++++++++
>  scripts/Kbuild.include             |    7 +++++++
>  2 files changed, 21 insertions(+), 0 deletions(-)
> 
> diff --git a/Documentation/kbuild/makefiles.txt b/Documentation/kbuild/makefiles.txt
> index 7a77533..51104f9 100644
> --- a/Documentation/kbuild/makefiles.txt
> +++ b/Documentation/kbuild/makefiles.txt
> @@ -383,6 +383,20 @@ more details, with real examples.
>  	to prerequisites are referenced with $(src) (because they are not
>  	generated files).
>  
> +    $(kecho)
> +	echoing information to user in a rule is often a good practice

	                    to users

> +	but when execution "make -s" one does not expect to see any output

	         executing

> +	except for warnings/errors.
> +	To support this kbuild define $(kecho) which will echo out the

	                       defines

> +	text following $(kecho) to stdout except if "make -s" is used.

s/except if/unless/

> +
> +	Example:
> +		#arch/blackfin/boot/Makefile
> +		$(obj)/vmImage: $(obj)/vmlinux.gz
> +			$(call if_changed,uimage)
> +			@$(kecho) 'Kernel: $@ is ready'
> +
> +
>  --- 3.11 $(CC) support functions
>  
>  	The kernel may be built with several different versions of


---
~Randy
--
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