+$(toolchain/stamp-compile): $(tools/stamp-compile)
+$(target/stamp-compile): $(toolchain/stamp-install) $(tools/stamp-install) $(BUILD_DIR)/.prepared
+$(package/stamp-compile): $(target/stamp-compile)
+$(target/stamp-install): $(package/stamp-compile) $(package/stamp-install)
+
+$(BUILD_DIR)/.prepared: Makefile
+ @mkdir -p $$(dirname $@)
+ @touch $@
+