From: David Bauer <mail@david-bauer.net>
Date: Fri, 23 Jul 2021 01:32:38 +0200
Subject: generic: Kconfig: exit on unset symbol

Signed-off-by: David Bauer <mail@david-bauer.net>

diff --git a/target/linux/generic/hack-5.4/205-kconfig-exit.patch b/target/linux/generic/hack-5.4/205-kconfig-exit.patch
new file mode 100644
index 0000000000000000000000000000000000000000..ddffd0816c9d76f0da03d0cbb30ae734fe43c182
--- /dev/null
+++ b/target/linux/generic/hack-5.4/205-kconfig-exit.patch
@@ -0,0 +1,11 @@
+--- a/scripts/kconfig/conf.c
++++ b/scripts/kconfig/conf.c
+@@ -212,6 +212,8 @@ static int conf_sym(struct menu *menu)
+ 				break;
+ 			continue;
+ 		case 0:
++			if (!sym_has_value(sym) && !tty_stdio)
++				exit(1);
+ 			newval = oldval;
+ 			break;
+ 		case '?':