quiet compile kernel

quiet compile kernel

[loody]

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?

-- 
Thanks for your help,
miloody

quiet compile kernel

[Prasad Joshi]

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.

Thanks and Regards,
Prasad

>
> --
> Thanks for your help,
> miloody
>
> _______________________________________________
> Kernelnewbies mailing list
> Kernelnewbies at kernelnewbies.org
> http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
>

quiet compile kernel

[Dean Floyd]

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