Building with the attached random configuration file,

drivers/built-in.o: In function `set_type':
tuner-core.c:(.text+0x3718c1): undefined reference to `microtune_attach'
tuner-core.c:(.text+0x3718e3): undefined reference to `tda829x_attach'
tuner-core.c:(.text+0x3719c6): undefined reference to `xc2028_attach'
tuner-core.c:(.text+0x3719df): undefined reference to `tda9887_attach'
tuner-core.c:(.text+0x371a31): undefined reference to `xc5000_attach'
tuner-core.c:(.text+0x371a5f): undefined reference to `tda18271_attach'
tuner-core.c:(.text+0x371ab5): undefined reference to `simple_tuner_attach'
drivers/built-in.o: In function `tuner_probe':
tuner-core.c:(.text+0x371df8): undefined reference to `tda829x_probe'
make: *** [vmlinux] Error 1