build: add option to treat recursive deps as error

Running make with RECURSIVE_DEP_IS_ERROR=1 will cause a hard failure
when a recursive dependency is detected.  This is useful to apply
stricter Ci tests, for example.

Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>

diff --git a/include/toplevel.mk b/include/toplevel.mk
index ad8e5b8f20428e7b81054e367dbc782258f0d43a..5cf93ce7effd76f6da3cb3cf43ef8f842d975d5a 100644 (file)
--- a/include/toplevel.mk
+++ b/include/toplevel.mk
@@ -99,6 +99,9 @@ prepare-tmpinfo: FORCE
                $(_SINGLE)$(NO_TRACE_MAKE) menuconfig $(PREP_MK); \
        fi
 
+ifeq ($(RECURSIVE_DEP_IS_ERROR),1)
+  KCONF_FLAGS=--fatalrecursive
+endif
 ifneq ($(DISTRO_PKG_CONFIG),)
 scripts/config/%onf: export PATH:=$(dir $(DISTRO_PKG_CONFIG)):$(PATH)
 endif
@@ -111,7 +114,7 @@ $(eval $(call rdep,scripts/config,scripts/config/mconf))
 
 config: scripts/config/conf prepare-tmpinfo FORCE
        [ -L .config ] && export KCONFIG_OVERWRITECONFIG=1; \
-               $< Config.in
+               $< $(KCONF_FLAGS) Config.in
 
 config-clean: FORCE
        $(_SINGLE)$(NO_TRACE_MAKE) -C scripts/config clean
@@ -120,7 +123,7 @@ defconfig: scripts/config/conf prepare-tmpinfo FORCE
        touch .config
        @if [ ! -s .config -a -e $(HOME)/.openwrt/defconfig ]; then cp $(HOME)/.openwrt/defconfig .config; fi
        [ -L .config ] && export KCONFIG_OVERWRITECONFIG=1; \
-               $< --defconfig=.config Config.in
+               $< $(KCONF_FLAGS) --defconfig=.config Config.in
 
 confdefault-y=allyes
 confdefault-m=allmod
@@ -129,7 +132,7 @@ confdefault:=$(confdefault-$(CONFDEFAULT))
 
 oldconfig: scripts/config/conf prepare-tmpinfo FORCE
        [ -L .config ] && export KCONFIG_OVERWRITECONFIG=1; \
-               $< --$(if $(confdefault),$(confdefault),old)config Config.in
+               $< $(KCONF_FLAGS) --$(if $(confdefault),$(confdefault),old)config Config.in
 
 menuconfig: scripts/config/mconf prepare-tmpinfo FORCE
        if [ \! -e .config -a -e $(HOME)/.openwrt/defconfig ]; then \
@@ -210,7 +213,7 @@ ifeq ($(SDK),1)
 
 %::
        @+$(PREP_MK) $(NO_TRACE_MAKE) -r -s prereq
-       @./scripts/config/conf --defconfig=.config Config.in
+       @./scripts/config/conf $(KCONF_FLAGS) --defconfig=.config Config.in
        @+$(ULIMIT_FIX) $(SUBMAKE) -r $@
 
 else
@@ -219,7 +222,7 @@ else
        @+$(PREP_MK) $(NO_TRACE_MAKE) -r -s prereq
        @( \
                cp .config tmp/.config; \
-               ./scripts/config/conf --defconfig=tmp/.config -w tmp/.config Config.in > /dev/null 2>&1; \
+               ./scripts/config/conf $(KCONF_FLAGS) --defconfig=tmp/.config -w tmp/.config Config.in > /dev/null 2>&1; \
                if ./scripts/kconfig.pl '>' .config tmp/.config | grep -q CONFIG; then \
                        printf "$(_R)WARNING: your configuration is out of sync. Please run make menuconfig, oldconfig or defconfig!$(_N)\n" >&2; \
                fi \