From mboxrd@z Thu Jan  1 00:00:00 1970
From: dean.floyd.lkml@gmail.com (Dean Floyd)
Date: Wed, 27 Apr 2011 20:13:05 -0700
Subject: quiet compile kernel
In-Reply-To: <BANLkTi=YxrnyWe4RRnD=7sMkX8yjPuBkPw@mail.gmail.com>
References: <BANLkTi=DKQDyRn_L-GGeSeyCimuUMGpSUQ@mail.gmail.com>
	<BANLkTi=YxrnyWe4RRnD=7sMkX8yjPuBkPw@mail.gmail.com>
Message-ID: <BANLkTikJs+7ozwKHkeh+XyGYXpiefHzZag@mail.gmail.com>
To: kernelnewbies@lists.kernelnewbies.org
List-Id: kernelnewbies.lists.kernelnewbies.org

On Wed, Apr 27, 2011 at 10:04 AM, Prasad Joshi <prasadjoshi124@gmail.com> wrote:
> On Wed, Apr 27, 2011 at 5:48 PM, loody <miloody@gmail.com> wrote:
>> Hi all:
>> I found the compile message of kernel is quite succinct, when we set
>> V=0, and I try to make my project output as clean as kernel did.
>>
>> Then I traced the Makefile and it just define "quiet" and "Q" then export it.
>> Where is the exact place that quiet build begin?
>>
>> Is that complicated to copy this quiet-build process?
>
> Here is a simple way to do it
>
> Makefile:
> ifeq ($(strip $(V)),)
> ? ? ? ?E = @echo
> ? ? ? ?Q = @
> else
> ? ? ? ?E = @\#
> ? ? ? ?Q =
> endif
> export E Q
>
> %.o: %.c
> ? ? ? ?$(E) " ?CC ? ? ?" $@
> ? ? ? ?$(Q) $(CC) -c $(CFLAGS) $< -o $@
>
>
> So when V is defined, the make command will display the detailed
> compilation message or else it will only show an echoed message. One
> can also add a check for verbose level.

You may also want to do something like the following:

.SILENT:

%.o: %.c
        echo "    CC    $<"
        $(CC) -g -c $< -o $@

--
Dean