Re: Why build empty object files in drivers/media?

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On Fri, 22 Jul 2005 19:46:00 +0000, 
Sam Ravnborg <[email protected]> wrote:
>On Thu, Jul 21, 2005 at 11:06:21PM -0400, Chuck Ebbert wrote:
>> 
>> I have this in my .config file for 2.6.13-rc3:
>> 
>> 
>> #
>> # Multimedia devices
>> #
>> # CONFIG_VIDEO_DEV is not set
>> 
>> #
>> # Digital Video Broadcasting Devices
>> #
>> # CONFIG_DVB is not set
>> 
>> 
>> And yet these completely empty files are being built:
>> 
>> ...
>kbuild is told to visit these directories - and then it build an empty
>.o file to make linking step possible.
>The only solution is to tell kbuild not to visit these directories
>unless they are in real use.
>Following untested patch should do the trick. But the media people must
>check if before being applied since I have only taken a brief look at
>the Kconfig and Makefile files.
>
>	Sam
>
>diff --git a/drivers/media/Makefile b/drivers/media/Makefile
>--- a/drivers/media/Makefile
>+++ b/drivers/media/Makefile
>@@ -2,4 +2,7 @@
> # Makefile for the kernel multimedia device drivers.
> #
> 
>-obj-y        := video/ radio/ dvb/ common/
>+obj-y                   := common/
>+obj-$(CONFIG_VIDEO_DEV) := video/
>+obj-$(CONFIG_VIDEO_DEV) := radio/
>+obj-$(CONFIG_DVB)       := dvb/

That should be +=, not :=

+obj-$(CONFIG_VIDEO_DEV) += video/
+obj-$(CONFIG_VIDEO_DEV) += radio/
+obj-$(CONFIG_DVB)       += dvb/

-
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