The configuration that coreboot uses for setting selected symbols typically involves a structure like this: config BLEH_SPECIFIC_OPTIONS def_bool y select SYMBOL This leads to an an extra kconfig symbol BLEH_SPECIFIC_OPTIONS that is never referenced by anything else, generating a warning. Since this is currently the construct that coreboot uses, filter it out of the warnings for now. Change-Id: I85a95e4c4e8469870c7f219f2a92955819845573 Signed-off-by: Martin Roth <martinroth@google.com> Reviewed-on: https://review.coreboot.org/13457 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>