build system: add a feature that allows you to pull sources from a git tree instead...

[openwrt.git] / include / toplevel.mk

diff --git a/include/toplevel.mk b/include/toplevel.mk
index e9384ae..19b25d3 100644 (file)
--- a/include/toplevel.mk
+++ b/include/toplevel.mk
@@ -134,6 +134,13 @@ prereq:: prepare-tmpinfo .config
 
 %::
        @+$(PREP_MK) $(NO_TRACE_MAKE) -r -s prereq
+       @( \
+               cp .config tmp/.config; \
+               ./scripts/config/conf -D tmp/.config -w tmp/.config Config.in > /dev/null 2>&1; \
+               if ./scripts/kconfig.pl '>' .config tmp/.config | grep -q CONFIG; then \
+                       echo "WARNING: your configuration is out of sync. Please run make menuconfig, oldconfig or defconfig!"; \
+               fi \
+       )
        @+$(SUBMAKE) -r $@
 
 help: