build: enable using $(CONFIG_FOO) on the rhs of config files

	$(call quiet-command,echo '# no devices' > $@,"  GEN   $@")

else

config-all-devices.mak: $(SUBDIR_DEVICES_MAK)

	$(call quiet-command,cat $(SUBDIR_DEVICES_MAK) | grep =y | sort -u > $@,"  GEN   $@")

	$(call quiet-command, sed -n \

             's|^\([^=]*\)=\(.*\)$$|\1:=$$(findstring y,$$(\1)\2)|p' \

             $(SUBDIR_DEVICES_MAK) | sort -u > $@, \

             "  GEN   $@")

endif

-include $(SUBDIR_DEVICES_MAK_DEP)