This is basically a -Werror mode for Kconfig. When exporting
KCONFIG_STRICT in the Makefile, warnings in Kconfig will produce
errors instead.
This will make it easier to spot unclean Kconfig files, settings
and dependencies.
Change-Id: I941af24c3ccb10b8b9ddc5c98327154749ebbbc6
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/10977
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>