In fact, this leads to 'make oldconfig' waiting for user input without prompting her for any.
@@ -393,7 +393,7 @@ menuconfig: $(CONFIG)/mconf defconfig .menu
_config: $(CONFIG)/conf .menu
-@touch .config
- @$(CONFIG)/conf ${W} $(CONFIG_CONFIG_IN) >/dev/null
+ @$(CONFIG)/conf ${W} $(CONFIG_CONFIG_IN)
${POSTCONFIG}
.NOTPARALLEL: _mconfig