Re: Why is DVB stuff compiling?

[Michael Krufky <mkrufky@linuxtv.org>]

Cyber Dog wrote:

> I'm a bit confused here.  I have a custom kernel configuration, and
> I've trimmed out most of the multimedia aspects sound/video/etc
> because this is for a server machine.  I was just recompiling, and I
> noticed there was still some media stuff compiling:
>
> LD      drivers/input/serio/built-in.o
>  LD      drivers/media/common/built-in.o
>  LD      drivers/media/dvb/b2c2/built-in.o
>  LD      drivers/media/dvb/bt8xx/built-in.o
>  LD      drivers/media/dvb/cinergyT2/built-in.o
>  LD      drivers/media/dvb/dvb-core/built-in.o
>  LD      drivers/media/dvb/dvb-usb/built-in.o
>  LD      drivers/media/dvb/frontends/built-in.o
>  LD      drivers/media/dvb/pluto2/built-in.o
>  LD      drivers/media/dvb/ttpci/built-in.o
>  LD      drivers/media/dvb/ttusb-budget/built-in.o
>  LD      drivers/media/dvb/ttusb-dec/built-in.o
>  LD      drivers/media/dvb/built-in.o
>  LD      drivers/media/radio/built-in.o
>  LD      drivers/media/video/built-in.o
>  LD      drivers/media/built-in.o
>  LD      drivers/misc/built-in.o
>  CC      drivers/net/Space.o
>
> This confuses me, because as I said, I'm not including multimedia in
> the kernel.  I checked the config and I see the following:
>
> #
> # Multimedia devices
> #
> # CONFIG_VIDEO_DEV is not set
>
> #
> # Digital Video Broadcasting Devices
> #
> # CONFIG_DVB is not set
>
> Which is what I would expect.  So why are these things compiling into
> the kernel even if they're not selected? Or am I missing something
> about the process?  Kernel 2.6.13.3 here.  Thanks.
>  
If you go look, you will notice that all of those built-in.o are zero 
bytes large.  We've already fixed this in kernel 2.6.14 by preventing 
the build of these empty units with the following patch (you can safely 
apply it to 2.6.13.y):

Don't build empty built-in.o when DVB/V4L is not configured.
Thanks to Sam Ravnborg and Keith Owens.

Signed-off-by: Johannes Stezenbach <js@linuxtv.org <mailto:js@linuxtv.org>>
===================================================================
RCS file: /cvs/linuxtv/dvb-kernel/linux/drivers/media/Makefile,v
retrieving revision 1.1
retrieving revision 1.2
diff -u -r1.1 -r1.2
--- dvb-kernel/linux/drivers/media/Makefile	2003/01/09 10:28:42	1.1
+++ dvb-kernel/linux/drivers/media/Makefile	2005/07/24 17:30:02	1.2
@@ -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/




Regards,

Michael Krufky

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