> On Sun, May 11, 2008 at 3:21 AM, Ingo Molnar <mingo@elte.hu> wrote:
> >
> > x86.git testing found the following build failure:
> >
> > drivers/built-in.o: In function `pvr2_dvb_feed_thread':
> > pvrusb2-dvb.c:(.text+0x127e78): undefined reference to `dvb_dmx_swfilter'
> > drivers/built-in.o: In function `pvr2_dvb_adapter_exit':
> > pvrusb2-dvb.c:(.text+0x128357): undefined reference to `dvb_net_release'
> > pvrusb2-dvb.c:(.text+0x12836f): undefined reference to `dvb_dmxdev_release'
> > [...]
> >
> > with this config:
> >
> >
http://redhat.com/~mingo/misc/config-Sun_May_11_07_06_35_CEST_2008.bad
> >
> > the reason for the missing symbols is this combination:
> >
> > CONFIG_VIDEO_PVRUSB2=y
> > CONFIG_DVB_CORE=m
> >
> > i.e. pvrusb2 is built-in, dvb-core is modular.
> >
> > This patch solves the problem by adding a dependency on DVB_CORE - this
> > is used by other drivers such as au0828 as well. This way the pvrusb2
> > driver can still be built, but if dvb-core is a module then it will
> > correctly be a module as well and cannot be built-in.
> >
> > Signed-off-by: Ingo Molnar <mingo@elte.hu>
> > ---
> > drivers/media/video/pvrusb2/Kconfig | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > Index: linux/drivers/media/video/pvrusb2/Kconfig
> > ===================================================================
> > --- linux.orig/drivers/media/video/pvrusb2/Kconfig
> > +++ linux/drivers/media/video/pvrusb2/Kconfig
> > @@ -1,6 +1,6 @@
> > config VIDEO_PVRUSB2
> > tristate "Hauppauge WinTV-PVR USB2 support"
> > - depends on VIDEO_V4L2 && I2C
> > + depends on VIDEO_V4L2 && I2C && DVB_CORE
> > select FW_LOADER
> > select MEDIA_TUNER
> > select VIDEO_TVEEPROM
> >
>
> Ingo,
>
> VIDEO_PVRUSB2 should not depend on DVB_CORE unless VIDEO_PVRUSB2_DVB
> is selected, which already depends on DVB_CORE.
>
> For example, if a user has VIDEO_PVRUSB2_DVB not selected, then your
> patch would generate a false dependency on DVB_CORE.
