build: toplevel.mk: fix missing kconfig dependency tracking

Toplevel Make is not aware about changes in the `scripts/config/*conf`
targets and this is causing issues for during update to that part of
build tree, where one needs to handle this manually by either force
rebuilding the targets or running `make config-clean`. Fix this by
forcing the rebuild if necessary.

Fixes: #9297
Signed-off-by: Petr Štetiar <ynezz@true.cz>

diff --git a/include/toplevel.mk b/include/toplevel.mk
index 1e543ebcb98f3fd2cdc2a7c21b21aa59b115ba3d..ce744bc92ccf6713adea67f3ad15a1622c9ca935 100644 (file)
--- a/include/toplevel.mk
+++ b/include/toplevel.mk
@@ -101,7 +101,7 @@ ifneq ($(DISTRO_PKG_CONFIG),)
 scripts/config/%onf: export PATH:=$(dir $(DISTRO_PKG_CONFIG)):$(PATH)
 endif
 scripts/config/%onf: CFLAGS+= -O2
-scripts/config/%onf:
+scripts/config/%onf: FORCE
        @$(_SINGLE)$(SUBMAKE) $(if $(findstring s,$(OPENWRT_VERBOSE)),,-s) \
                -C scripts/config $(notdir $@)