From 300d26562ce4dc427154cb247beb75db4b1f0774 Mon Sep 17 00:00:00 2001
From: OpenWrt community <openwrt-devel@lists.openwrt.org>
Date: Wed, 13 Jul 2022 13:29:57 +0200
Subject: [PATCH] scripts/Kconfig: Kconfig exit

---
 scripts/kconfig/conf.c | 2 ++
 1 file changed, 2 insertions(+)

--- a/scripts/kconfig/conf.c
+++ b/scripts/kconfig/conf.c
@@ -435,6 +435,8 @@ static int conf_sym(struct menu *menu)
 				break;
 			continue;
 		case 0:
+			if (!sym_has_value(sym) && !tty_stdio && getenv("FAIL_ON_UNCONFIGURED"))
+				exit(1);
 			newval = oldval;
 			break;
 		case '?':