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I stumbled over this site about USB video grabber under Linux, I'm trying to compile the code found here. I have read about makefiles but this one confuses me, cause it's so short:

usbtv-y := usbtv-core.o \
    usbtv-video.o

obj-$(CONFIG_VIDEO_USBTV) += usbtv.o

I wanted to write now my own makefile. What I want to know now is, what the Kconfig file is for and how to use it. I have a hard time finding more information about how to use it. Can someone enlighten me please?

Here's the Kconfig file:

config VIDEO_USBTV
        tristate "USBTV007 video capture support"
        depends on VIDEO_V4L2
        select VIDEOBUF2_VMALLOC

        ---help---
          This is a video4linux2 driver for USBTV007 based video capture devices.

          To compile this driver as a module, choose M here: the
          module will be called usbtv

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